I play only Titan, Striker in PvP and Defender in PvE, and I used to agree with you 100%..... then I started getting serious about the Crucible. It takes time, a lot of time, and yes the Titan has a decently long learning curve and you will get killed a lot and feel like you want to punch a hole in your tv, but resist.... there is hope! I used to think "hey I'm a Titan, I can rush that group of four guys and just melee them!" and I used to be lucky if I got 4 kills in an entire match, and I would cry and say "why are Titans so weak??? They are supposed to be tanks!" Then I switched the way I play and now I'm getting three kills at a time with FoH and ranking higher than dead last, sometimes even at the top! It's all about playing, playing, and playing some more and learning from your mistakes. If something isn't working, switch it up. Try different loadouts. If you're not getting kills with a shotgun, switch to a fusion rifle. Utilize Shoulder Charge + Transfusion! Every kill with shoulder charge will automatically kick-start health regen. You are slower than they are so don't get caught in the open, stick to close quarters, that's where you will shine!