Villan is very lag, PFR of 25%

Did I donk call the river?

Poker Stars
No Limit Holdem Ring game
Blinds: $0.05/$0.10
6 players


Pre-flop: (6 players) Hero is UTG with
Hero calls, UTG+1 folds, CO raises to $0.3, 3 folds, Hero calls.

Flop: ($0.75, 2 players)
Hero checks, CO bets $0.4, Hero calls.

Turn: ($1.55, 2 players)
Hero checks, CO bets $1.4, Hero calls.

River: ($4.35, 2 players)
Hero checks, CO bets $4.1, Hero calls.

Results:
Final pot: $12.55


Should I have put him all in on the river? I didn't as I thought he may actually have AK, giving him the better boat.

Uhhhh he plays a lot of hands so why does he have to have AK or AA here. The river call is really bad, he's gonna call with an A or a J at this limit so put him in on the river

Yeah pretty much a donk call, but at least you realized it rather than kept doing it.

Only two hands beat you and with a PFR of 25 he will have (and pay off with) a very wide variety of crap.