There are several reasons why your airpods may be dying so fast, and luckily there are some things you can do to fix the issue. These include disabling siri, switching ears regularly, ensuring that only one of them is charged at a time, cleaning the charging case, and even updating your firmware. This will help to increase the life of your airpods.
Batteries don't like extreme temperatures, and if you regularly store your AirPods in an extremely hot environment, they can lose the ability to reach a full charge. They can also drain faster when left out of their case, as every time you open and close the case, it draws extra power from the batteries.
The AirPods' tiny batteries are designed to last a couple of years, after which their maximum capacity will start to diminish. This is due to all sorts of factors, including dendrites that can grow inside the battery and cause it to deteriorate.
AirPods are not designed with repair in mind, and they're held together primarily with adhesive. It's therefore difficult to tell whether yours are damaged or just have a worse battery than normal.
If you're struggling to get the most out of your AirPods, it might be time to consider replacing them with a new pair. The good news is that there are plenty of places to buy used Apple products, and you can often get the latest model for a fraction of the price of a new pair.