Leading into the preflop aggressor with top pair is a mistake; check-calling preserves range strength and prevents getting blown off your equity.
Leading here is a significant error. We should check our entire range to the preflop raiser, as they hold the range advantage on most high-card textures.
Note: Donk betting top pair is a mistake; checking allows us to protect our range and let the CO bluff with their air.
Continuing to lead on the turn is compounding the flop mistake. The 3c is a dynamic card that completes several straights (A2, 67, 26) which are more prevalent in our range, but we still prefer checking.
Note: Double barreling into the raiser after a flop donk is overly aggressive with a marginal value hand.
Once we are raised, the situation becomes very difficult. While we have top pair and a gutshot, the CO's raise represents extreme strength on this texture.
Checking the river is mandatory. The Jack is a bad card for us as it pairs the CO's overcards and we have now been demoted to second pair.
This is a very tough spot. We are getting 4:1 odds, but our hand has significantly weakened and the CO's line is extremely credible for value.