so weve been playing HU for a while, and villain keeps xR my cbets, and i keep folding, and this is maybe the first or second time ive b3b against him.

also, its highly unlikely that villain has a better overpair in his range, considering how relentlessly he was 3betting me preflop.

therefore, his range here is pretty narrow. on the flop, when he calls my 3b, he could have --

hands that crush me:

A3 [8 comb.]; 44 [1 comb.]; 33 [1 comb.]

hands that i crush:

55-88 [24 comb.]

the same hand that i have:

99 [1 comb.]

a 4x hand:

A4 [12 comb.]; 45s [3 comb.]

ace with a gutshot:

A2 [12 comb.]; A5 [12 comb.]

some kind of straightdraw:

56 [villain wont always call 56o pre, so maybe its ~8 comb.]; a stubborn 67s [3 comb. (?)]

so ... against a range of {33-99,A2s-A4s,65s,54s,A3o-A4o,Ac5d,Ac5h,Ac5s,Ah5d,Ah5s,Ah5c,As5d,As2h,Ac2d,Ac2h,Ac2s,Ah2c,Ah2s,Ah2d,As2d,6s5h,6s5c,6c5d,6c5s,As5h}, 99 has 54% equity. even 66 has 43% equity here.

and yet, i feel like if i shove here, im getting my money in pretty bad a disproportionate amount of the time.

is this hand super-standard, and i just lack experience with HU play?