Bowser pretty much has to come from below. Unless I'm mistaken, when sweetspotting the ledge, Bowser's Up-B hitbox does not last as long as a well-timed edge grab, so it can be as easy as grabbing the edge before him at times...which is fairly bad...
How? Bowsers recovery is very hard to gimp. There are a lot of recoveries out there that are easier. If bowser is near the stage, he can use up b and get there quite quick since it's a pretty fast move. If he's far he can jump and DI in and then recover and seeing how bowser is the heaviest/tied for heaviest char getting him far off won't happen until higher damage. Plus, When you DO go for a gimp, we can up B before you do and take advantage of UB's invincibility frames and very good priority.
If the bowser players using his laggy moves to often he's playing wrong.
We don't NEED the speed. Are moves ae fast enough and have quite a big range that we can take advantage of that. Moves like ftilt, dtilt, fortress etc. have more then enough range to keep enemies away.
Also, most of his powerful moves have advantages a well. Fsmash has a drawback animation and isn't to laggy (except ending lag). Upsmash has a giant hitbox and destroys people on platforms as well as having good range. Dsmash can punish rolers to some extent but other then that you won't see this one to often.
His grab isn't "terrible", it's bad but definitely doesn't qualify as terrible. Bowser's shield is huge so you'll be seeing quite a bit of out of shield grabs. Playing on platforms means upsmash for you. Staying near the edge is also not very safe since he doesn't HAVE to grab you.
Last hit can lead to many things depending on the char. A lot of chars suffer from getting klawed which could be a free cide if possible and if not it's a guaranteed 18-19 damage. Wario gets hit by all (or almost, not sure about dsmash) of bowsers smashes on air release and on ground release he gets quite a bit as well. Jiggs gets a free uair and bowsers uair is very good. There are also other things like jabs, regrab, dtilt (which on the edge can kill quite well on certain chars) etc.
Saying "missing a grab" isn't a very valid argument. It's not that hard to use the chain grab and after even a couple days of practice most people have it down.
Camping isn't very good against bowser (read the rest before you kill me for that). I mean that it isn't something new or amazing that will wreck bowser. Power shielding is quite easy and bowsers shield is also big enough for him to get far. Bowser can use ^b which clings with quite a bit of projectiles thanks to high priority and invincibility frames. It also cancels automatically when hit. Sheik can't camp us very well can't say anything about the other two but there matchup isn't that bad for bowser (44-55 each). Combo's in brawl?!?!?! Seriously though the can juggle him but we can get out and fortress is usually a good way.
Klaw hopping, power shielding, fortress and more are all examples of bowser approaching. They all work quite well =/
Yes bowser can't force approch very well (usually just using fire and a few other things) but he CAN approach. In-ability to force approach isn't enough to put someone in low tier IMO
-Bowser King
Bowser will pretty much have to approach anyone with a projectile, and it's more about speed than range. D-Tilt and Up-B will leave Bowser open, and F-Tilt can get shieldgrabbed without TOO much trouble.
Bowser's Forward-Smash is fairly easy to see coming, and for any of his Smashes, if they miss, they're laggy enough to get punished for using, which is what matters.
His grab range is utter garbage unless he uses a running grab, and if he whiffs a running grab, he's taking some major punishment. An opponent on a platform can jump away from the Up-Smash or fall through the platform with an airdodge and punish an Up-Smash. If I'm not mistaken, his standing grab is somewhat slow as well, further hampering its effectiveness.
Staying near the edge is more beneficial for the opponent than it is for Bowser, because it allows other chaingrabbing characters more space to do their thing, and it takes away one of Bowser's options.
Bowser's not going to be able to grab Wario. Just saying.
Powershielding will only get you so far between Falco and Sheik's jabs and grabs in-between. For Sheik, if you use an Up-B to get out of a juggle, then you're easy pickings for a sweetspotted Up-Smash.
Klawhopping isn't difficult to outrange, a walking shield is just begging to get grabbed, and Up-B goes so far, as the opponent will try baiting it in order to punish it. Bowser can approach, sure, but he can't do it that well...