Agreed. I certainly didn't expect the Brewers to contend that year. But by the end of April they were 20-8 and Wang should have been cut loose. The Brewers quickly knew they could only use him in blow outs, which basically burns a roster spot. Plus I think it was unfair to send the guy into games to get his brains bashed out since he was clearly over his head.
That said, I'm sure he enjoyed the big league paycheck.
(Edit - I just checked his game logs for that year. He made 14 appearances. The Brewers lost 13 of those 14 games. The one game he pitched in that the Brewers won was a 11-5 victory over the Cubs. He pitched the 8th when the Brewers were up 11-3. Did not give up any runs in his 1 inning though!)