Chatgpt keeps repeating the same mistake

I am a chatgpt paid user

I gave the chatbot a negative prompt, but it continues to use the words in the negative prompt.

I told chatgpt not to use bold font, but it keep adding bold font.

Why do chatgpt repeat the same mistakes?

I have been trying to do some front end part with tailwind. Chatgpt is not able to understand it and even with the screenshot also. The recent update for chatgpt is the worst thing they did. It is not getting a simple context what we are trying to say. The o1 preview is the worst thing i have had ever seen.