100nl AKo vs loose fish + reg

[rpm]

opener is 53/30 with 17% 3bet and 25% fold to 3b over 60. he has busted and reloaded once. his second BI he ran up to ~240bb and is now borderline busto and probably pretty tilted or just spewy all the time.
notes read:
- min 3b/call large 4b w/ATo in BU v CO. jam over CB on J82t
- OL/3b jam 80bb on BU over SB 5x raise
- 3x open/4b jam 33 in HJ vs CO 3b + BU flat
- open/call 3b w/ATo UTG, C/C 3 streets on Q63T9

button is 17/13 with a 6% 3b and 84% fold to 3b. over 180
only history is he 4x 3b/5b jammed AKo on BB vs my BU open/4b. i had KK.

is the BU's range capped due to flatting pre? he probably should be flatting hands like AA/KK here because the fish is jamming over me close to 100% of the time, so flatting AA/KK gives me more of a chance to make a mistake with hands like TT-QQ,AK. but fuck knows if he knows that or not. no idea how many tables he's playing.

oh yeah and BU has seen me 3b AQo in UTG+1 vs fish's UTG opening range ~100bb deep (the last hand in my notes vs fish) if that's of any relevance.

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) - PokerStars Converter Tool from FlopTurnRiver.com
UTG ($46.10)
Hero (UTG+1) ($215.80)
MP1 ($120.40)
MP2 ($100)
CO ($100)
Button ($228.90)
SB ($138)
BB ($112.65)
Preflop: Hero is UTG+1 with K, A
UTG bets $4, Hero raises to $10, 3 folds, Button calls $10, 2 folds, UTG raises to $46.10 (All-In), Hero ($205 effective with BU)?