Aces cracked by quads

PokerStars Hand #241000000010: Hold'em No Limit ($1/$2 USD) - 2024/02/02 19:12:00 ET
Table 'Cassiopeia' 6-max Seat #2 is the button
Seat 1: Hero ($300 in chips)
Seat 2: Villain ($300 in chips)
Seat 3: Nit ($300 in chips)
Seat 4: Reg ($300 in chips)
Seat 5: Fish ($300 in chips)
Seat 6: TAG ($300 in chips)
Nit: posts small blind $1
Reg: posts big blind $2
*** HOLE CARDS ***
Dealt to Hero [Ah As]
Fish: folds
TAG: folds
Hero: raises $4 to $6
Villain: calls $6
Nit: folds
Reg: calls $4
*** FLOP *** [Ks 8d 3c]
Reg: checks
Hero: bets $12
Villain: calls $12
Reg: folds
*** TURN *** [Ks 8d 3c] [8s]
Hero: bets $34
Villain: raises $66 to $100
Hero: calls $66
*** RIVER *** [Ks 8d 3c 8s] [3h]
Hero: checks
Villain: bets $150
Hero: calls $150
*** SHOW DOWN ***
Hero: shows [Ah As] (two pair, Aces and Eights)
Villain: shows [8h 8c] (four of a kind, Eights)
Villain collected $543 from pot
*** SUMMARY ***
Total pot $543 | Rake $0
Board [Ks 8d 3c 8s 3h]
Seat 1: Hero showed [Ah As] and lost with two pair, Aces and Eights
Seat 2: Villain (button) showed [8h 8c] and won ($543) with four of a kind, Eights