How to prevent thread damage (especially on rear axles)

I need to remove the spacer (in lime green), but the thread (in pink) is messed up.

Need to remove the driver on the other side of the axle, so clean and switch it out, but that thread is also done.

How do I prevent thread damage from happening in the first place?
Or is that unavoidable sooner or later (since the fork or frame put pressure on it right?)

I know that there is tools to fix broken threads, just need to get the right one, lots of right lubricant and a little luck, but I really dont wanna go through all that just to be able to switch out a driver

Thanks!