I have 40 hands on both Villains who are around 40/20 and playing aggressively v bets

Flop - I have showdown value, I'm not looking for 3 streets of value. I think they will bluff random cards

Turn - 2nd check is far too passive, isn't it? I'm now thinking I should have bet small and bet again on any favourable river card (ie not a diamond, A, K, Q or pairing board)

River - I checked it down to see what they had. I shouid have bet, I think. 20-25% to extract thin value?