I haven’t seen the show. From the context you provided and assuming good faith from both parties, it sounds like a skill issue on both their parts.

Don’t understand words? Ask for clarification during the conversation, not after the fact in a performance review.

Audience doesn’t understand your words? If the audience tells you they don’t understand, take that feedback and try to communicate more effectively.

It’s not fair to judge if this is micromanaging or toxic based on the first discussion about it. It depends on how both parties behave and choose to cooperate now that the issue has been raised. Knowing whatever history these characters have and the tone of the scene might paint a better picture of their intentions.