Welcome to /c/piracy
No netflix or streaming services landlubbers allowed, this is pirates territory.
Is thepiratebay still worth using? I haven't visited in years
Page next and back buttons have been gone for like 10 years now but you can manually browse by adding :2 for page two to your search, :3 and so on
I've been using TPB regularly for over a decade. Goes down now and then but usually back up in a day or 2 tops
Have you found the content to be reliable/trustworthy? Last I looked, it was just full of uploaded-yesterday highly suspicious links.
This is where I have been finding anything I really need to torrent.
I stopped for a couple of years during the peak of kickass torrent, when I came back TPB had moved to an onion domain but it seems the quality is higher than in the 2010s.
I typically order by highest seeders, I only really download games and TV shows/ movies and have had decent luck.
I use a pirate proxy for 90% of my torrent usage.
Imo it kind of never was but it does serve as a beacon of hope and takes a lot of the heat.
I don't really use it directly, but I have it as a source in radarr/sonarr so occasionally I get stuff from there. Hasn't let me down so far!
what other websites do you use? I want the list, the full list
What are you the cia? 
For movies (rip rarbg) I use TorrentLeech
For music I use Soulseek
For books I use irc.irchighway.net #ebooks
I recently purchased a Usenet subscription+indexer to plug up any gaps, and it seems to be a pretty good option as well (although not free).
For software, I just try to always go open source when I can, and I don't really pirate games. I find executables to just be too risky.
not the op but thanks dude! now, you're under arrest under the suspicion of not seeding enough.