Why am I still green after 7 months of starting CF?

I spent 2.5 hours / day on average for CF and solved 400 non *800 problems on various topics.

read & follow advice from "how to improve", "how to become expert"

"practice problems slightly higher than your rating", "learn binary search", "do virtual participation", etc

I did everything I could and still green.

Normally, if regular person spends this amount of time and effort on single topic, then it should be *1600 (elo rating, expert in cf) but that was my personal belief.

this is far far below average, I've never experienced this level of suffering in my life from middle school to college entrance or even gaming.

I'm getting serious and start to reconsider my life.