Had almost a 3.0 K/D when I started with Striker, have a 2.x with Defender now. They are better at CQC and worse at everything else. Both their base melees kind of suck (except compared to Gunslinger), but Titan can OHKO if you sprint for a while first and and Defender gains a shield after a melee kill. Fists of Havok is powerful, but much shorter range than many other Supers and hard to get multikills on longer range maps and outside of Control. Ward of Dawn is useless outside of CQC if the enemy chooses to just avoid you. It's a boxing ring with you at an advantage... where the enemy can choose not to fight you. Like all classes, the Titan Striker and Defender are good in certain situations and bad in others. You just need to get better or use a different class.