I find I also often have the opposite problem. I'll encounter code that is actually poorly written and hard to understand/modify, but by the time I've put the e

I find I also often have the opposite problem. I'll encounter code that is actually poorly written and hard to understand/modify, but by the time I've put the effort into working out what's going on it's hard to properly remember just how much work it was to get to that point of understanding and so I don't actually fix it. It's like Stockholm syndrome for developers.