They also have very frequent cases where the site throws up an error page or is completely unreachable because it is under heavy load. I can't think of another major social network that has those problems on a weekly basis either.
Not recently, but Twitter's "fail whale" became famous due to problems Twitter had under heavy load.
I still regularly see Reddit failures every week.
That was also a decade ago.
I regularly get the fail whale on mobile, but I suspect it's an intentional dark pattern to push you into the mobile app rather than an engineering issue.