No one said he "didn't get what he wanted". We're saying (or at least I am) that he fucked up by wanting it. Casting her was a bad decision.
First I have to say that I like Chrysta Bell's Tammy.
But yeah, I don't understand the "this is what Lynch wanted" defense at all. If that is acceptable in this case, why not in other cases too? Whenever someone is acting poorly in someone's opinion it could always be what the director wanted.
I'm sure that if we look at the movie and tv history and see what scenes and performances these people think are bad, many of those scenes and performances are actually just the way the director wanted them to be. It still doesn't mean they couldn't be seen as bad.
While I have no issues with Chrysta Bell whatsoever I think that whatever Lynch has wanted from Matthew Lillard in this season has been just about the worst acting the entire series has had. His overacting took me off the scene hard and I don't think I can find myself finding any excuses to like that performance. I think I understand Tamara Preston and I think I understand Wally Brando. I like them both. But I don't get Bill Hastings at all. The things that are said by him and about him are good, but the way he delivers the information is very hard to watch. Lynch wanting him to be that way doesn't make that performance any better. The only thing it affects is my view on Lynch's taste with this certain character.
As a side note I think one of my new pet peeves now is to see the word "Lynchian."