He isn't weak though. Considering the fact that he became an awakened not long ago, his progress is already immense. And it's not like just because he gained force control doesn't mean he'll eventually master how to use it all at once. He's incredibly young if you compare him with all the disciples that's trying to compete/fight with him
for you it may be fine, but considering the circumstances, resources, and the powers he got through the chapters already compensates the late awakening. it just seems to me that his growth is too dragging knowing that very powerful force controls were bestowed to him while his opponents only got the one bestowed by their masters. That's how I feel.
Of course I'd have high expectations. It's the writer's fault for giving him too many force controls and he still lacks the ability to manifest them or use them that much in the latest chapters. If he wasn't bestowed many "force controls", which I think was the target of other top ten by the way, then I wouldn't be expecting this much from him.

I'm starting to hate how weak he still is when he has learned four force controls. and not to mention we are already on chapter 379! What has he been doing all this time! It's getting boring.