This was just a sorry movie. The acting was terrible. It was like all of the actors were actually just reading from the script, and were not very good readers. I got through 25 minutes of this movie, and could not take anymore.
Well, Tommy Wiseau has a dressed the fact that Mark was originally going to be played by a black actor. I think the fact that that actor left the project was likely such an enormous story in entertainment news at the time probably has something to do with it. It was such a coveted role, and every actor in Hollywood wanted it, so when a black actor was replaced with mega star Greg Sestero, people took offense.
It just didn't seem fair to people that Tommy Wiseau nearly opted for diversity, but instead showed himself to be part of the typical Hollywood elite that he is.