I watched the match and thought that:

the umpiring was probably a wee bit heavy-handed, but
Serena’s behavior was outrageous and unacceptable, even given that.

If Serena were to watch the video of her outburst, and after some self-reflection STILL think that her behavior was acceptable, much less warranted (in the press conference she basically said she was fighting for women’s rights), and doesn’t realize that she should obviously apologize, then she isn’t someone I’d want to be around. Her behavior was at its worst BEFORE the game penalty, and showed total disregard for her worthy and gracious opponent. In my opinion she behaved like a self-centered rude bully. I felt the same about McEnroe when he was playing.