This person started putting me down for no reason, why?

If he still has an account online or if you can give a phone number, I'd report him. OLD sites want to maintain and safe environment for their clients, and abuse shouldn't be tolerated; it undermines the users' trust in others when they are victimized. It's unnecessary for him to act that way, and obviously he's ugly inside so who is he to talk, you know? As for responding to him, I wouldn't. 

Block and move on 

Leave it alone. He's a total loser either way. 

Maybe he was unstable, I mean he definitely has anger issues and he shouldn’t have been rude, 💯 agreed. 

However I’m gonna be honest, it’s possible that you did legitimately seem to be a fake profile/bot/catfisher. Like maybe you acted in a sketch way (such as not wanting to meet, not proving you were you, etc). 

There’s a LOT of girls and guys like that on dating apps/sites, which is why I recommend if a guy asks you to prove that you’re you, you should just do it. Like if he says “send me a video of you doing a thumbs up holding a spoon”, it may seem silly but just do it. It proves you’re a real person and not a bot or catfisher.

With that said if he wants NUDES, yeah, don’t send those. But if he wants a fully clothed pic of you just proving that you’re you? Then I don’t see what’s wrong with him wanting that, honestly? Because there is a LOTTT of fake profiles. *IF ANYTHING IT SHOWS HE IS SMART AND VALUES HIS TIME EFFICIENCY WHICH IS A SIGN OF A SUCCESSFUL MAN.* My husband who I met, makes $190,000 a year, and he didn’t wanna wait to meet me. High quality men don’t bojangle around. But guess what? We have a beautiful home, have been on amazing travel & scuba diving vacations to Portugal, Hawaii, Puerto Rico, Cayman Islands, Florida, and Mexico! 

I found my husband on Bumble app (We have an amazing relationship btw!), but both me and him saw a bunch of catfish/fake profiles on the dating apps. So it’s just how it goes. I was willing to meet my now-husband the very next day (to hang and see a movie), so he knew I wasn’t fake tho bcuz I had committed to meeting him in person in a reasonable timeframe (24 hours) to see if we click 

I wouldn’t respond. Online dating is a waste of time anyways.