I have the exact same problem. I have two consoles and two copies of the game, but no matter how many times I try to meet myself in a ranked match it fails epicly. I can find people using quick match pretty easily, but a lot of people tend to spam the same attacks. The only trophy I'm missing is School for the Gifted, but even when I try spamming to match my opponent I rarely pull off a win. I will admit that I do run into some fighters who play normally, but I suck so badly at this game that it really doesn't matter for me either way.
Originally posted by johnnyla
I tried boosting these trophies but I can never get ranked match to find an opponent. I tried boosting with Big_Jonny but whereas he found opponents, I couldn't, even after a 10 min wait. I think it's down to the MVC3 servers and my internet router, I tried everything putting the PS3 on the router's DMZ, port forwarding, you name it, and yet I still get NAT type 2 in my connection settings. I thought it was to do with the save game at first but even on a newly created save I had the same couldn't connect to a ranked match problem. Player matches do connect though, albeit after a slight wait on occasion. This is very frustrating as I only have a few online trophies left, plus the beat arcade on highest difficulty in offline mode for the Platinum.
I don't know which online trophies you're having difficulties with, but I assume it's School for the Gifted and Combat Specialist? Actually reaching the 1st class rank would certainly be no simple task, but I finally matched up with another fighter who was 1st class. When it comes to School for the Gifted though, I know you can backup your save from the XMB after a victory and restore the save if you lose until you reach five wins. With that in mind I believe it would be possible for someone to upload a save with four wins in a row (maybe more) making this trophy much easier (I know it's probably not that hard for most people, but like I said above, I suck at this game.)