If we're talking about bias reasons for least favorite Smash game the winner has to go to Smash 4. That game is SO lacking in anything to do.
Yeah, I can jump online and play a few games but Master Orders and Crazy Orders was pretty lazy. Events felt like a retread of Brawl's and Melee's and those were done more concise and better. Smash Run was ok. Not good by any means though. It had potential but it fell flat. Smash Tour suuuuucked. Like bad. Classic mode ****ing blew as well. Like how do you **** up Classic? 3DS's was ok but the Wii U's was a **** fire. Then there's the cutting of Snake, Wolf, Lucas, and Ice Climbers which just broke my damn heart. So bad. If it hadn't been for DLC giving us some damn banger characters (Roy, Mewtwo, Lucas, Ryu, Cloud, Corrin, and Bayonetta) I would've hated that game. Which sucks because Little Mac was a big reason I got into speculation. That made my ****ing day. And before that Mega Man?! Amazing. Pac-Man? Cool. Like the game had some good newcomers. Everything else, including the cuts, and the weird speed of the game which I still dont like to this day, just made me dislike the game.
I felt like when I was playing there was always something missing. That pretty much sums up my feelings on For. It felt incomplete.
Brawl did some stuff wrong. It did. The speed, the random tripping, Mewtwo being cut, and arguably the art style but I feel like it absolutely ****ing nailed everything else. Adventure. Nailed it. Classic. Perfect. Newcomers. ****ing Diddy, Wario, Dedede, Meta Knight, Wolf, Lucas, Sonic, and Snake just to name a few is ****ing Legendary. Modes. Target Test, Stage Builder, Boss Battles, All-star, Subspace, Homerun Contest, Multi-man Brawl, Classic. Brawl felt like a step up from Melee in every category except for competitive play but even then Brawl's scene lasted for a damn long time.
If it weren't for Ultimate being almost perfect, would've loved trophies and some platforming in my adventure mode though, Brawl would still be my favorite by far. The only reason Melee has a higher pedigree than Brawl is because of the changes to the games speed... and tripping.