I don't mind radiant quests, they give people something to do way after everything else is done which I think is better than just running out of missions altogether. I can see why it bothers completionists though, I also like to keep my mission list as thin as possible so sometimes that aspect is annoying, but it is a minor thing. I remember the minutemen quests in Fallout 4 being one of the more annoying ones I have seen, but they easy enough to ignore. If in the future they increase in variability then that would be even better, I have been playing AC Odyssey lately and it actually has some great radiant quests that vary a good bit, delivered both through message boards in towns and just random ppl that pop up on your map occasionally. Also, the Thieves Guild quests do actually have a purpose (somewhat) because if you do enough of them you can trigger an event.