>>1556696There is no stable source of all movies anywhere, but there are plenty of torrent sites you can use such as
ext.to (generic search of popular open trackers) or rutracker (Russian interface, but most movies have English audio tracks included). For DDLs and streaming I genuinely don't know as I don't use that. These two are usually enough for me unless it's some rare Asian or European stuff.
For streaming Russian speakers love kinopub, which is a paid piracy site, hence it may not suit you, but it has right about anything and usually with original dub being an option. Essentially works like a cheaper Netflix with a much bigger catalogue.