Some MMO's take time to get to peak performance from yourself.
I'm a massive WoW player and have been for many years now. Way back to Burning Crusade. For the first half a year I felt absolutely rubbish. I eventually got every single control hardwired into my brain as is natural with months of playtime. It's since got ridiculously easy for newer players but I'd be considered a Veteran, it helped me top the SWC leaderboards for PVP over 2 months
I have achievements in that game I never thought even possible for myself to hit. There's always something to learn though. Always.
If you can throw time at it then give the game a try, if you actually enjoy it, never put it off due to controls or it just being hard, MMO's aren't meant to be a five minute play, they're meant to keep you learning and forever evolving whilst you experience it. Just stick at it.