You are exactly right. Levin gave Trump a lot of leeway and treated him fairly. Trump has no one to blame but himself and the thugs he surrounds himself with.
Yeah, it’s been quite an about face for Levin. He seemed as sympathetic and supportive of Trump early on as Hannity, Ingraham, etc. I assume the fact that Trump isn’t actually a conservative weighed on him over time - especially when there is an actual, real conservative in the race with Ted Cruz.