I am super angry how huge exchanges make money at the expense of silently stealing from me and all users
That's a weird way to announce your own competing business! Legit exchanges don't steal, they publish their fees on their website.
you will also notice that you received a bank transfer out of nowhere
My bank is not going to like that! They'll want to know where the money came from, and who I did business with.
Apart from having to trust you (which I don't), I'm curious where you're earning money. You can't just transfer large amounts through your bank account and expect no questions, and you also can't maintain an exchange infrastructure without earning from it.
Lastly, P2P exchanges are nothing new. You're basically trying to be an escrow, without the reputation needed to do so.