Well, it could be that Peter Parker disagrees with the actions or ideologies of Team Cap. Maybe he thinks their stance during the Civil War was wrong in terms of how it affected the public or the superhero community. He might tell them off for being too self - centered in their fight against the Sokovia Accords.
Well, it could be about Peter Parker having a serious conversation with Team Cap, perhaps warning them about some impending danger that he's detected with his spider - sense. He might be telling them to back off from a certain situation that he believes is too risky for them.
It could be a new villain who has somehow influenced Team Cap's actions. This villain might be using Team Cap as a means to achieve their own evil goals, and Peter Parker realizes this and tells Team Cap off for being so easily manipulated.
I'm not sure specifically what 'Cap deage' means. It could be a very specific term, a misspelling, or something relatively unknown. It might be a proper name, a local term in a certain area or a very niche concept.
I don't have enough information to say exactly who Cap'n Kathy is. She could be an original character created by the fan fiction writer. Maybe she's a pirate - the 'cap'n' part could suggest that - who has some connection to the wizarding world of Harry Potter.
Wanda Maximoff might be a key character too. Her powers were a big concern in the Sokovia Accords situation. Peter could tell her off for not being more careful with her powers and for getting involved in the conflict on Team Cap's side. Also, Clint Barton, Hawkeye, who came out of retirement to support Team Cap. Peter might criticize him for coming back into the fray and adding to the chaos instead of staying out of it.
The cap man and monkey story is an interesting one. There was this cap man who was traveling around selling his caps. He reached a place near a forest and decided to take a rest under a tree. While he was sleeping, the monkeys in the tree noticed the caps. They climbed down, grabbed the caps, and went back up the tree. When the man woke up, he was confused at first, then saw the monkeys with his caps. He was worried as those caps were his livelihood. But then he remembered that monkeys often mimic human actions. So he took off his own cap and tossed it. The monkeys, being the imitators they are, did the same with the caps they had taken, and the cap man got his caps back.