If you're skilled you can last for a while in a Titan, it's all about knowing when to commit and when to back down and regenerate health. After a few upgrades there are some nice upgrades such as the electric-smoke-thingy which electrocutes any pilots who attach themselves to your Titan. Also the auto-aim pistol needs multiple locks to take someone down and getting those locks takes a while, so it's only really effecting against campers. Which is fair I think.
Make no mistake though, this isn't a Mech game, but for a fast-paced shooter I found it really fun.