As he aged he went to booze because who wouldn’t after Sam Winchester and Dean Winchester Oh my pudding shirt dealing with everything he had to deal with. He knew he was Sam’s only hope and as a big brother, he felt he was responsible for Sam because their dad was never around. He didn’t want to leave Sam alone, john was always gone so sam would have been alone. Dean coped by knowing he was there to take care of Sam and watch out for his little brother and protect him no matter what because that’s what John asked him to do. Dean is and always has been afraid of disappointing his dad so he made sure he didn’t. Sam coped knowing he had a plan on getting out of the hunting business and doing his life differently than his dads and brothers.
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