My mouse is double clicking. Any way to fix?

So pretty much I've had this mouse since 2020 and have had no issues with it until now.

The problem:
50% of the time when I do any click (it doesn't matter if I hold the click for long or not) my pc will immediately register a 2nd click right when I release it, even though only 1 click sound is heard.

I tested it and it does also happen on other pcs, so the issue must be in the mouse.

The mouse in question:
It's been so long that idk what mouse it is, and it took me a while to find online because it apparently just doesn't exist anymore anywhere... after some digging I found a manual though: https://usermanual.wiki/m/d58b677fdf09ed4cac2810029ef0a8a644e85203718ca402517e9b6f9fd1c35a.pdf

I've done a lot of research but I can't find a solution; I've taken my mouse apart, but couldn't get the actual switch boxes open, I cleaned out my mouse but nothing happened, swapped the battery many times, reset stuff in device manager, but it still does it.

Is this something that just happens with mice and then its time to get a new one? Or is it fixable, and if so, how?

If anyone has any ideas, help would be appreciated.

also idk if this is a relevant post in this sub lol