You can still easily crush the micros with downward sloping redline really in NLHE
I'd recommend to get a coach that does a database review for you
Or try befriend a good player that'd share his database so you can compare
There ought to be some blatant areas for improvement there just from general stats, I'd be surprised if there weren't.
And then you take a look at winrates in specific situations that are much worse and take a look at specific hands.
As to "Leaks" yes, yes you do have tons of leaks, everyone does, even the top players
It's just about working on the ones that are costing you the most money and gradually improving. It almost never happens to me that I'd say I played a session perfectly, just better than last time, there's not enough timebanks in the world and you don't have to play anywhere near perfect to crush your opposition