I liked it a lot. I think the end where Landa switched sides in a way made a ton of sense. He didn't really care about the Nazi cause or exterminating the Jews. He was simply an opportunist. He was good at hunting Jews and did it as a job in a sense. Once he saw the writing on the wall he jumped at the next best opportunity to side with the winning team.
Or do you mean the end in the theater? Ya, that was a bit odd, but kind of on par with the movie and QT's style of going over the top and weird.