It's not really all that bad. The really really early game is rough due to how little you have access to. Frankly the early early game sucks.*snip*
A lot.
I hate it.
Until you get to Tarkus you're down there in the trenches. By late game, Kineticist eventually can waltz about with like 71 intellect and 69 Will and manhandle the entirety of Dhaal.
Even before that, by the mid game, while it may not outscale the other classes in raw damage, it does scale substantially more easily (that is, with less trips to the gym or conversations with Syri) whilst also becoming effectively immortal due to it's tools.
The (probably) hardest part of kineticist is picking the right combination of skills for the build you want to go down. Unlike the other classes, I'd say it's exceptionally easier to just flat out brick your character.
After that it's just getting the right gear.
Kineticist gets 13 minimum defense for free at max level. Those 0 defense pieces in the game that have 5-10 Crit bonus? You can rock them without much drawback.
Crit's especially noteworthy because of how free it makes single fights due to Deep Impact. Each crit stacks the stun debuff. So, you mentioned Hureya. This is after 3 turns.

5 Entire turns of stun. Sundered on top of that. Obviously no enemy can even possibly move let alone survive. It's like a Magma Crusher but with every single weapon instead.
The damage isn't too shabby. If you get a frost crit on a sundered target you're reaching ludicrous heights only kineticists can get (if lucky)

The best part about those two is that they don't really use turns. Concussive Augmentation is a free action (so is levitation) and haste attacks as part of the cast.and it's still suck because concussive augmentation and haste has turn limits
It costs energy but you have 200 of it. It also has comparatively substantially more on it's regain.
Mercenary can restore half, Tech Specialist restores 33+, Smuggler has IIRC 60-75 +25% (at low health)
Kineticist get's 75% or 150+ (more if you opt to take the accessory that gives 25% additional).
Is it as broken OP as Smuggler and Tech? Nah. But it's not that bad.