A boundary works better when it describes your action instead of trying to control another person’s feelings.

A limit that depends on someone else’s reaction is not really a limit; it is a request wearing a firmer voice. Asking someone to stop being annoyed hands them the power to decide whether it holds. What you can actually say is what you will do: when this happens, here is what I will do about it.

Take a limit you have been trying to enforce and rewrite it as a sentence about your own behaviour. Keep it small enough to follow through. Say it once, calmly, and let their feelings about it be theirs.