The way Bakugou is talking to Deku here is definitely not going to do him any favors. I can understand the idea that maybe talking things through with him won't get him to change his mind, but calling him an All Might ******* wannabe? That's like ignoring all of the shit that's been happening to him for the past, dozen or so chapters. Yes, I believe that Deku is being ridiculously reckless here and that he could always use assistance, but in his eyes, (and debatably, this might be valid) this is the only way Deku is capable of hunting down AFO and Shiggy without hurting anyone close to him.
Bakugou is being incredibly ignorant towards Deku here regarding his decisions to leave U.A. In his eyes? He probably thinks that Deku is just being a dumbass. In his eyes, he probably just thinks Deku has been wearing himself down for days on end for a ridiculous reason, "saving everyone." Which couldn't be further from the truth. There is a multitude of reasons as to why Deku's going solo; to protect U.A, to try and save Shigaraki and the villains who he never had a chance to save, and to better a society that is on its last legs. As the ninth holder of One for All, Deku doesn't really have a choice on whether or not he's obligated to do these things.
And more on the topic of Bakugou's behavior; some might say Bakugou is just taunting Deku. Okay then, but why though? There's no reason to be a dick to someone who's had to burden more stuff than anyone in Class 1-A combined. If anything? If Bakugou truly wants Deku to receive help from them, it might just be better to lay down the logic, facts, and benefits of them teaming up. If he has time to try and take a piss on Deku, why doesn't he have time to reason with him?
This comment has kind of gone on way longer than I anticipated, considering that I just felt like venting my inner feelings regards to these characters, but I hope you were able to take something from my two cents.