Currently, there is no way to downgrade or "reset" a firmware on Airpods Pro, KayneGiordano. My suggestion is the following. I compiled a full list of our current options to help right now below:
I'm going to reply to all those mentioning this issue with this information so they can get the help they need (and a notification that they were replied to. This way, they can all get help the quickest way possible)
Please do the following A and B:
A) Submit a case with AppleCare
1) Go to https://support.apple.com/airpods
2) Scroll to "Tell us how we can help"
3) Click "Get support"
4) Just go through the menus and pick the most relevant option. I suggest picking "Audio Quality" but there are others.
5) Click "Chat" and let them know through chat the problems and also please reference our thread in the chat: https://discussions.apple.com/thread/250887615
(OR you can schedule a call but it may be best to ask for a follow-up call during the chat if they don't mention it themselves)
IMPORTANT: Mention that the ANC quality was reduced with the AirPods Pro firmware 2B588 and the problem is STILL in firmware 2C54!
ALSO:
B) Please also file a bug report about this on the feedback section while your case with AppleCare is ongoing. That way, both AppleCare and the bug report staff will see these reports.
If we all do this, they will see the growing number of issues with this.
Submit the bug report feedback here: https://www.apple.com/feedback/airpods.html