Mike had worked on my bikes for years prior to me moving a long way away, and I never had an issue with his or his team's work. He prepped my race bikes for a couple of seasons and always kept my feet on the ground when it came to costs/mods.
I wouldn't slate MD until you have spoken to him and confirmed what you thinks happened - and he's had a chance to let you know his side and rectify it if it was his fault - although that sounds pretty shocking.