This is probably an unpopular opinion, but for me, Reddit sucked as long as I've known it. It wasn't too bad when I first joined in about 2012, but since then the decline has been rapid. It's nothing but a soulless moneygrab of a website that's obsessed with adds and downloading it's app. It is the KING of asshole website design (unreviewed content anyone?). It has, for lack of a better word, gone "mainstream" and "sold out".
It is VERY easy to get shadowbanned on reddit, either through just linking something the automated system doesn't like (very aggressive anti spam policy) or having the sheer nerve to have a differing opinion that a mod doesn't like. A quick look at the shadowbanned community reveals countless accounts that are suspended.
I found on my former account I got shadowbanned via email, whenever I used that email, I'd get automatically suspended, however I did find that signing up via the Gmail account directly opposed to just the email got around the ban, as did using another email (as long as you get your sellable information eh Reddit?). I have no idea if they ban via IP, I'd imagine they do, but with VPNs and dynamic IPs these days, it'd be easy to circumvent.
Reddit have long been heavy handed on banning suicide topics though, I'm surprised that sub still exists actually.