I moved away from my parents and put them on an information diet. They eventually figured out that our relationship would be on my terms or not at all.

If they got pushy or invasive I would block them for a month. They threw a fit at first, my dad even stopped talking to me for almost 3 years when I moved away.

They eventually learned I was serious and was not going to cave to their demands and came grovelling back to me. They definitely try and slip back into their old ways, but I shut that down right away.

You can't ask people nicley to treat you with respect. That doesn't work on people like this. You need to set boundaries, and follow through with enforcing them.