Here is a theory: People that are very competitive (in sports, work, everything), love to be contrarians. It makes them feel superior. They love to be the guy who bet against the top and nailed the move down while all the 'idiots' were buying. Its like crushing your opponent in a sports competition. So given a choice they have this bias towards contrarianism, they last thing they want to be that idiot who bought the top.
Citron said "I’ve never been more bearish on the market than I am right now because of foolishness like this. The market today is a total get-rich-quick scheme. The lunatics are running the asylum.". The problem is that buying bubbles is rational, Soros used to say that a lot. The longer is goes, the more exponential it becomes. And longs have limited risk, while shorts have assymetric risks against it.
So these contrarians have a bias that goes against the risk management of the trade, the rationality of the trade, perhaps even against the expected value of the trade. Over long periods of time, you will:
-You might go broke, especially if you short calls
-If you size down or take losses as things rise, you will not go broke but you will post significant losses. If you run a hedge fund, its likely your career will be over at some point.
-Your risk adjusted returns will be WORSE off than if you didnt do all that contrarian shorting
Then these contrarians come out and blame the market for their misfortunes, now they are blaiming reddit, but there is always someone to blame.
When I shorted KBIO at $2 and it went to $23 in 3 hours, I felt this urge to blame Martin Skrelli. It was a clear manipulative squeeze. But I was the idiot who shorted a thin stock and held it overnight. I deserve the blame more than he did. But hey, I learned a huge lesson that day. It helped me develop some of my investing methods later on