Reddit has had extremely spotty reliability forever. It got better in recent years, but still came down every few weeks, or would just randomly say "you broke reddit!". Circa 2015 every evening it would just randomly return 50x errors a good chunk of the time because it was always overloaded.

Backend reliability mustn't be very high up their priority list. Well, neither is UX (old OR new reddit), and let's not pretend that they've been masterminds when it comes to ad placement either, so the real question is what do the higher ups want, and why can't they achieve it?