Bakugo vs the giant villain from the movie is a good display of his mobility.
https://youtu.be/YPHoawIW1Ec Go to 1:47.
It's incredibly brief, but it displays just how near untouchable Bakugo is to someone not as mobile as he is, as well as how fast he can redirect himself with explosions in the middle of a fight to gain an advantage on his opponent. Also in the movie, Bakugo finished a race up a large hill, destroying villain bots all around said hill, in 15 seconds due to how fast and mobile he was, faster even than 5% Deku.
https://youtu.be/ggzWcba79Dk
Again, a brief moment showing how fast and agile Bakugo is in mid air, as well as how good he is at changing direction easily. Does Chel have any way of comparing to this mobility?
Other than that, there was the time he evaded the league of villains by himself, the above posted scans of him evading Deku and Todoroki, and some other minor feats that don't matter much. Bakugo has things to back up his mobility being very good. Does Chel?
Deku studied Bakugo for his entire life, knew his fighting style, knew his quirk, and had Batman level prep against him mentally (minus the personality), and still would have gotten stomped on if he didn't have one for all, not because Bakugo was stronger, but because Bakugo can change his tactics to adapt to his opponents weakness incredibly fast. Whether you believe the world of mha is tactical or not, Bakugo outskilled Deku who had access to practically all his information.
If that's not good enough, Bakugo outskilled Todoroki and would have forced him to use his fire, despite him being trained since childhood by one of the best combat heroes. Bakugo outskilled whole teams of students in the sports festival with his tactics. Bakugo literally stomped on everyone that came his way thinking he was a brute because he's actually one of the smartest kids in U.A., but you're telling me he isn't skilled enough to figure out Chel's abilities, and out maneuver her? What insane feats of skill does she have that completely void all of Bakugo's training and showings?
Bakugo doesn't one shot "everyone" he comes across, and even the ones he does, he uses his intelligence first to "get" the one shot. It's not like he walks up to people and blows them up, like that's the only style of fighting he's ever displayed. He is analytical, as shown with how he deconstructs quirks like Kirishima's and Tokoyami's to find their weaknesses and how to blow them up in the most efficient way.
Higher AP is irrelevant if she can't touch him. Her invulnerability makes her unable to move or attack. Her other moves are literally fodder that get dodged by Bakugo moving in a separate direction.
No, seriously: what move in Chel's arsenal exists that can catch Bakugo while he's redirecting himself in the air? The only move I can think of is her dash attack, because all her other moves are incredibly straight forward and not useful at all, and even it can be reacted to by Bakugo just exploding away.
Also, can we talk about how Chel takes twice as much damage from attacks in berserk mode? Because I feel like that's an important part about how Bakugo beats her. She's taking more damage than she can reliably handle for a long time, against someone she's going to be struggling to hit. That's not even mentioning Bakugo using his gauntlets or howitzer impact. Chel is not perfect with her invulnerability either, so she will be hit by Bakugo's attacks, especially if he's outmaneuvering her.
Bakugo directly takes the full force of his explosions every single time he lets them off. He is undamaged or even bothered by all but the most potent of his explosions, which are much higher than his normal AP, and therefore his dura, but even then he can fire dozens of them at a time.
https://youtu.be/bG1cpuAaLFU Go to 2:20, those blasts are the ones that hurt him.
Bakugo absolutely upscales from tanking the force of his normal explosions easily.
5% full cowl Deku doesn't hurt himself with his attacks, what did you mean? I'm talking about the several above 1 ton durability feats he has calced on his page. Bakugo scales to 5% in terms of durability, as shown when Deku is actually hurt by Bakugo's Gauntlet blast, while Bakugo is practically unfazed by using them.
I think your understanding of the keys is a bit skewed. U.A. Beginnings is everything from the start of the show to the fight between AFO and AM. That includes the forest training arc and movie.
Ok, now it just seems like you're ******** on MHA because you don't like it rather than you actually have constructive evidence about why Bakugo's displays of skill aren't worth much.
Also, how about providing some feats for Chel that show she can keep up with Bakugo rather than trying to bring Bakugo down? If she's so versatile and mobile, where are her feats?
"Chel has worse showings than Bakugo so she loses" is an argument I'm now making.