Free Step Dodge

I try, but when they keep kicking me from lobbies or leaving once I join, it's difficult.

^ What he said. Not teaching anyone anything unless they want to learn

There's a different mentality that people who don't traditionally play fighters bring to the table. The fact that they didn't have to pay to get in sometimes doesn't help. Some can't be helped but try shooting a message to someone after a match. Most will ignore you or send something stupid back, but you may get a bite.

Sometimes people have sent me PMs asking for help or complimenting my play or w/e in which case I always respond and am as helpful as possible, but hunting down the PSNIDs of the guys who just booted me from a lobby to send them a PM seems like a bit much.

I said after a match, lol. Not after someone boots you from one. I'm helpful to people that are open to it. That's about all I expect from anyone else.