You should probably stop feeding him peas, those are mainly for goldfish who only eat plants.
Bettas are insectivores so they cant digest peas and can make bloating worse.
Some members have been able to use them with success and they can work sometimes, but if your guys is still bloated, its not helping him out right now and could be making the problem worse.
How much do you feed him per day, and what do you feed him? Crowntails are more susceptible to bloat since their bodies are more streamlined so its really easy to over feed them.
Try fasting him for a few days and seeing if that helps.