If you can get used to it, play Counter Strike Source. There aren't any hackers, and if there are, they get banned pretty fast. Valve Anti Cheat is great, we need it one Combat Arms =P
Anyway, apart from Counter Strike Source, I would say WolfTeam, but for some reason that's not working for me right now, not loading/patching. It's really fun.
Crossfire is alright, but compared to Combat Arms, it's nothing. Bad graphics, not as much firepower.
Don't give up on Combat Arms. MapleStory was just as bad when it first started, but look at it now. Free of hackers, and highly enjoyable (If you're into that sort of game, which I'm not, to be honest).
Nexon will beat the hackers. Don't uninstall. Buy Elite Mod if you can, kick whoever the hell you want, and have loads of fun.
I just got Elite Mod for 30 days. In the first 2 days, I've had the most fun playing combat arms I ever have.
If you wanna gift me for my advice, that's fine, and much appreciated
Don't gift 8,000 NX though, a PSG MOD for 30 days is fine. My account name is : Jordanga
Thanks , and I hope you don't leave. We'll miss you D:
Jordan