"As long as the safety basics are covered it is very important that you step back and allow him to do things his way"
BeCool, if the only thing a mother is allowed to worry about is safety basics and expecting anything else of her co-parent is unreasonable and interfering, then you are saying it's fine for them to do the job badly as long as the child doesn't come to any serious harm.
You see it all the time on here - Dads who get up to let their wives have a rare lie in, and leave the house a complete shit tip that their wife has to deal with when she gets up, doesn't dress the children, completely ignores them, in some cases doesn't feed them, but it's all apparently OK because the children didn't die and the woman can't say anything because that is apparently "controlling".
"If you want an engaged involved parent, then leave him to it, trust that he can and will step up and parent."
That's fine when you are dealing with someone who wants to be an engaged and involved parent. Not all men do, it would seem.
There are many who just want to do the fun stuff and leave all the hard work to their wives.
"Accept that he might do things differently to you and this is OK."
But it's not always OK, is it?
I would not be at all OK if my husband was as shite as the OP's.
Why are you blaming her because she feels she needs to ask permission to take a shower?
Making women responsible for the relationship men have with their own children is pretty chauvinistic.