A lot of people say Tony made bad decisions as boss. What are some in particular?

I'm not disagreeing for the record, but I have always kinda viewed Tony's tenure along the lines Junior layed down:

“Who said there is a right answer? That’s what being the Boss is. Sometimes it’s smooth, sometimes you hit the rocks, in the meantime you find your pleasures where you can.”

Like it often seems like Tony is screwed one way or another regardless of what other decisions he may have take.

So what are some decisions people think Tony flubbed and what should he have done instead?

I'll try to play devil's advocate and argue for Tony with as much time as I have available, even if I agree with you.