They were as much socialist as North Korea is a Democratic People’s Republic.
The Nazis frequently fought against actual socialists and communists during the Weimar Republic period and put them in work and death camps once those got going. They cracked down on workers unions too.
I’m having the same problem with YouTube. Lately there is so much far right filth and Christianity. It doesn’t seem to matter how much I tell the app I’m not interested and not to recommend channels.