Flash Sucks?

According to this guy, flash sucks because it's apparently a usability problem for users. He may have listed other reasons, but I don't know what they are because I stopped reading after the second paragraph:

The ironic thing about Flash is that its use is so frequently self-defeating. Flash is often used in an attempt to make sites more user friendly. But replacing familiar browser components with custom Flash garbage only hurts usability. Consistency is imperative for a UI — users learn how to do something once, and can apply that knowledge in tons of places. But with Flash, overzealous designers try to “fix” what they see as bad interface models by creating custom Flash crap. This sucks.

Hmmm... I wonder if this guy has ever used Youtube. You know that INSANELY popular video website that is easier to use than automatic car door locks? And guess what, the video player Youtube uses is built on Flash! The problem here isn't the technology, the problem is the implementation of said technology. Your random movie promotion website might get extremely obnoxious with their use of Flash, but that doesn't make it a technology that "sucks".