I think the stress of running a gang at the brenk of collapse and also the suspension of any of them could be plotting against him could have lead him down the path of become a delusional psychopath we see in RDR 1 as well as losing a lot of his gang members including his best friend and two people he saw as his sons

I hear a lot of people say he changed towards the end of RDR2 but that just doesn’t sit right with me. We all know about the horrible way he killed Heidi McCourt during the Blackwater job, which went against the gang’s “killing in cold blood” code. He was breaking his own rules from the beginning.