Common mistakes dommes make when DMing a sub

Do you have any suggestions?

What I experience:

1. Dommes going straight into insult and disingenuous roleplay mode instead of sending normal messages first. To me, it shows a lack of respect.

2. Dommes not taking into account my requirements/boundaries I mention in my post (for example, when I say, I dont want to serve a faceless domme and then a faceless domme DMs me)

3. Dommes not accepting that I wont send to them before they verify their identity (there are just way too many scammers out there)