Walt is a piece of shyt, there's no argument about that from my end. However, all that "we had a good thing before you fukked it up" shyt Mike was talking is nothing but sour grapes. It's a criminal enterprise, ain't no room for the sentimental shyt. Get over your homie Gus getting blown the fukk up - he underestimated his opponent and paid the price. If we're following the cause and effect law that closely, then Mike should blame himself for all the times he failed to kill Walt. Point is, his goons being in jail isn't something Walt caused, it's just a circumstance of being in business with killers and drugs and shyt. Walt killed someone trying to kill him, that's part and parcel of this criminal shyt. In the here and now, Walt made Mike more money, tipped him off about the DEA, and got his "go bag" for him. I'm sorry, but I'm not about to pretend Wat was supposed to do these things because he fukked Mike's life up. It's criminal business, that kind of code doesn't hold up for me.
Mike was too fukking stubbornly salty about Walt killing Gus and being a general a$$hole to ever give him an ounce of respect or thanks. That's his prerogative, but it was his undoing and just as grave a character flaw as Walt's ego. Just because Walt has become a maniac, let's not pretend Mike is some angel who died to redeem our sins. He's a piece of shyt too, and his own sloppiness and stubborness brought on his death.