That and the massive amounts of drugs they consumed.

Their communes were full of people who sat around drugged all day, instead of working or contributing to their little society.

There was also a lot of division and sexism/feminism (surprise) throughout that also corrupted their morals and ideals.

I am not so certain. I think the hippy movement was the first time people rejected the official narrative and started to question the government and the media. Of course, the DS was able to adapt and corrupt the movement, but that is what they are good at. The concept of non-conformity and the questioning of dogma was at the core of the hippy movement, but it was a bandwagon that other conformists jumped on and non-conformity just became another conformists path. It seems to parallel with all the other non-conformist lifestyles, they all adapt a similar appearance and attitude. Bikers, goths, EMO, headbangers/metal heads, hipsters, etc. They all start out as a few non-conformists and then they are riddled with copycats. Next thing you know, it is a trend for douchebag conformists. The only non-conformists I know of are the solitary folks that abandon society altogether and go out into the wilderness and homestead.