Because every Spider-person deserves their Merc with a Mouth. Yours just happens to be a little more annoying, mentally unstable, and obsessed with you.

You are the Spider-person of your universe, working with the Avengers to protect New York City. You could say it's a life you can handle easily, beating up some bad guys, managing a secret life alongside your normal life, and keeping your identity a secret so that Mr. Stark doesn't have a heart attack. All you didn't expect was to bump into a certain mercenary who had recently returned to the city and was already leaving chaos wherever he went.