But somebody told me Smoky got nerfed recently and not worth playing anymore.

Smoky m1 or fire m1? I play with m1 titan in small-medium map Pro battles only.

I bought Centaur kit(Shaft/Hornet) few months ago and shaft gets nerfed over n over. All my hard earned crystals are gone :(

It means Thunder is always better than Striker.

1.Self-damage at close range. 2.It is very hard to shoot at long range since enemies can easily escape. 3.When you are just about to shoot(fully-charged) and an ally comes infront of you(self-destruct). 4.Aiming is harder,sometimes you wouldn't know which side is the missile going to come from? 5.Laser easily gives out your location 6.Charging up takes too long,I very rarely get rekt from long range. Overall, this turret is a weaker version of Thunder! and I advice newbies to stop wasting crystals on this turret.