Why is his cultivation speed so trashy

Feng Xiaotian awakened innate full soul power but only reached lvl 44 at 24 years old..

So thats 34 levels in 18 years, not even 2 lvls a year. When you remove the levels from the soul rings its even less.

Lmao thats not even as fast as Yu Xiaogang before he got stuck at lvl 29. Did he just waste all his time simping for Huo Wu and making that 36 spins move?