To me it looked like Ally didn't notice the time, since he didn't go ham at the end when he was about to lose, which he should do and I'm sure he would have. Try going for grab -> fair, or just jump off and fair to chase him. Or even just trying to get a fsmash-read. Just in case he would've gotten him. Can't hurt to try when you for sure lose otherwise anyway. He also gave up when he noticed it since it was already over. And he was playing really careful up until the end and it seemed like he wanted Mr R to approach as well, instead of trying to appraoch himself, which he could've at least done defensively.
That being said, the tree constellation is pretty bad - and to a certain extent circle camping is possible. Characters like Sheik, ZSS and Diddy with their bouncing fish and variants could jump from tree to tree back and forth, or go low if they need to. Sonic can do the same with his spinshot and some others might also have the tools to do something like that (Jigglypuff).
I've tried to test this strategy with someone a long time ago and it can be really tough to catch someone doing this. Even if you manage to do so it grants them enough extra seconds to promote the timeout well enough.
Not to mention the very scary fact that many characters, if they're standing on the tall tree could combo and KO you off the top at any or most % if they manage to catch you not spacing absolutely perfect on their shield. It's a very scary thing to follow anyone up the tree.
Samus can upB and catch anyone trying to jump at her. You can fake it out but if you never approach you don't really gain anything. Going up the tree to a different branch is also pretty risky since you aren't save while doing so. In tourney a MK camped my Luigi out after getting a stocklead by being on the tree, but I was able to read his jumps after a while and rising-tornado-killed him off the top. Lucky for me, he probably didn't expect this at all, but overall the situation is very much in the favor of the one who could get easy KOs off the top if you don't space everything and play super super save, in which case you basically have to hope you're scaring them to shield and wait for their shield to shrink enough to the point you can jump up again and they have to retreat somehow, which can still be a scary situation.
The stage isn't just ducks and dog who can interrupt the fight, the stage is basically made for camping and timing out with the trees and its size. Not only is the stage longer than FD (actually, I can't find data about that right now - I think it's the case but not 100 % sure on it), the blastzone is also further away from the edges, even if it doesn't look like it.
Just being able to ban the stage isn't too great of a reason to keep it allowed, imo. The reason being you basically have to ban TaC every set unless you play a character who can jank there, or you aren't playing against a player who plays any of the characters who can jank there.
Bayonetta, ZSS, MK and even Samus (maybe others as well) can get their cheese going on that stage for free, and there are still some "hoo-ha"s that benefit greatly from it. I always feel like the stage would benefit me too, since my characters mostly KO off the top, but it's not worth the risk KOing a few % earlier when the opponent can instantly KO me if he manages to hit me at some percent ranges that allow him to combo off the top.
Everyone should've seen the famous Nairo grab to KO combos on Mr R enough times to know that you absolutely have to ban the stage against ZSS. I mean, you can play with fire if you like to, but you could be burned too. It's basically ICs all over again, but without ZSS having a hindering Nana that you could gimp or hit away, and with her long ranged zair being able to combo into grabs (which lead to uair and upB strings).
It is way too risky to go to that stage against these characters unless you're trying to cheese them yourself. Besides DSR, and not having another stage you like still able to be picked in a bo5 set it feels like cheesing someone off the top is the only reason this stage is picked lately. If it wasn't for that lower ceiling the stage would be fine and much better, even if still flawed in some ways (not saying other stages don't have any flaws), but sadly we have to deal with this stuff.
Basically if you don't want to get camped out to hell by some characters you should ban Duck Hunt.
And if you don't want to get cheesed by some characters you have to ban TaC.
Some characters can do their stuff on both stages, and players could also use both of these character types to get one thing or another, depending on your ban.
I do think Duck Hunt has its positives. Being a long stage can benefit some characters, giving them more room, etc. But it really often feels like it's just there to time someone out, which it does help at. Of course it's smart of the players trying to do it, but it's a little degenerative if you ask me, and timeoutstuff, while sadly being an option (because otherwise matches and tournaments could take forever) is not healthy (I've tried to explain this further, but that is just too big of a topic so I just deleted everything again, I'm sure everyone can understand how it is not a good thing and it should be avoided if possible).
Of course some characters are better at forcing someone off the tree and stuff, but reducing character usage by characters who can't safely pressure someone on the tree, just to have a stage where characters can get timeouts easier and is mostly picked for that is not a good tradeoff imo.
Btw, while I do think it is better for the game if DH is banned, it's not like I absolutely hate it and I can see the good sides of it. The reason why I don't think it's good is just that it's supporting timeouts too much (with possible circle camping and immense advantages up on the tree (one correct read and you can get a stock)). And people will go for them since it helps them winning, obviously.
Though I have to admit, I came to like / appreciate the stage more over the recent time. In Austria we almost always have it banned, but in a bo5 set with 2 bans (1 per player) and DSR the stage choice can feel pretty limited.