A lot of games that have good bug reporting systems also have a very techliterate playerbase. Of the games I play, Dwarf Fortress, Starsector, Kerbal Space Program, are the ones which have good bug reporting systems, and which also have some very techliterate volunteers to do the crosslinking of duplicate entries and so on.
I've also played some other indie games where I've been able to talk directly with the programmer and describe a problem that later got fixed.
I've made some bug reports about things in HOI4 But, I am not very techliterate, despite doing a bit of modding things myself. I sometimes struggle to convey the problem I had encountered.
I do remember one thing that did eventually get fixed - the randomly generated female air aces , because Podcat was able to find the bit of code because I helped narrowed it down. It turned out to be a simple fix, but had been low priority, but I did manage to get it fixed eventually, and now everyone benefits in their own mods.
I think HOI4s playerbase is a bit too big for programmers to be able to deal directly with players, and I'm not sure there are enough people who are eloquent enough to write bug reports that convey the problem clearly enough for people to take action on.