you will never be able to beat those 20% if you cant crush those 80%.
and its clear you arent able to beat those 80% because after 50/100k hands you are still playing 5/10 nl w/o any results or w/ poor ones.
that means there are flaws in your game and that means that mainly your post flop game sucks since beeing looser pre isnt that bad if you have post skills.
beeing a bad post flop player is going to ruin you even more by starting to 3b wider then you should at your level since 3b/4b/5b and calling 3b/4b/5b is a part of the game that by itself implies first of all a higher variance and very good postflop skills. a variance will also induce a lot of tilt since you are not mentally fit for that kind of game , tilt which will induce even more variance and losses.

you are going to play huge pots w/ marginal hands when you have no ideea on how to play them and you have no clue on how to read the stats of your opp.

you are going to 3b A2o and LP calls. flop comes A33rainbow/ great flop for that hand. what do you do? do you bet? why? do you c/c ? why? do you c/r? why? if you bet and he calls, do fire again turn? on what cards? why? if we c/c what is the plan for turn? why? if he checks what do we do on turn? if he raises flop then what do we do? he has a 50% fold to 3b, but you never looked to see what is his LP fold to 3b which is more important then overall. how big is the sample ? he is folding 50% but what is he doing w/ the other 50%? how much of that is he calling and how much is he 4b pre? does he flat 3b w/ value hands that dominate us because by 4b them he will just make us fold our worse and just 4b bluffs a lot because we 3b wide but just fold to 4b like 90%? do we really need to have a 3b bluff range vs him if he always pays our value hands? and if you have answers to any of these questions on what do your arguments stand? intuition? general play of a stake? a 300/500/1000 hands sample? notes? what notes since you are zooming and never CTRL+FOLD to see what whe 3b/what size/ position/ what he cb or c/c or c/r/ or what he limps/call/ limps/3b or any kind of reads you can get.

you are a player that firres 3barrels w/ QJ on Q9357 w/ abssolutly no clue on why you are doing this but you wanna start 3b and play bigger pots w/ marginal hands when you cant even understand why you are 3b in the first place.

3b play has more questions then what i wrote and better ones maybe could make you understand better why you shouldnt go there before you start winning w/ ABC.

NOTE: "you" is not some particular peron on this forum, "you" is just a poker player.