It may have something to do with the complexity/inconsistency of the strings you're matching. I feel like often regexes work fine for me with a little fine-tuni

It may have something to do with the complexity/inconsistency of the strings you're matching. I feel like often regexes work fine for me with a little fine-tuning, but I have certainly run into examples in code I didn't write (or even code I did, months or years ago) which took me a lot of time to really wrap my head around.