Any popular posts that involve a minority/enemy of right wingers doing something bad or sticking out get brigaded. A blatant example is PublicFreakout where threads are usually fairly normal unless it’s a black/arab/Indian person doing the antagonizing then pretty much all the top comments are dog or regular whistles. Similar “brigading” can happen even in a city subreddit similar to r/Canada even if they are regular users otherwise. If the post is good enough fodder the subreddit will suddenly resemble a klan meetup even if it’s usually otherwise “normal”.
ActualPublicFreakout is an alternative that doesn’t need brigading because it’s already similar to WorldNews.
Blackout curtains help a lot from my experience. I have a hard time falling asleep and staying asleep to begin with and those make a big difference with or without an offset sleep schedule.
Melatonin can also help with sleep duration/quality but its also easy to become dependent on it to fall asleep so not ideal for long term.