Dave can't (and doesn't) hide from his drug addled self of the early years and there are times when he even apologises for it, but the way some people and sites react is still over the top. I don't think too many are surprised to hear he treated some support acts badly, but people just want to sink the boots in like it's actually something they are hearing for the first time.
Interestingly enough the same podcast where Chuck mentioned Dave he also mentioned what got him through the cancer treatment and how his native american heritage played a part in that. On Metal Archives some dick decided to open the topic with how fucking stupid Chuck must be believing in something that's not real to get him through. They then move on to kick Dave, but this one guy took offence at Chuck actually having some sort of spiritual connection.