Sonarr, public trackers, usenet

No idea regarding automation, but you can get (some) 4K TV series off rutracker (a public tracker).

https://rutracker.org/forum/viewforum.php?f=119

The site itself is in russian, but search queries in English work perfectly.

Content from English speaking countries almost always (literally around ~99.9% of the time) includes the original English audio track. You will have to manually set language priority in your video client as russian audio is set as the default track, but this should be easy to do.

Keep in mind that non-English movies/series will include the original audio and a russian dub/VO, English dub/VO will not be included. English subs are typically provided for non-English content.

Best public tracker I can say for newly release is milkie.cc (it is actually semi-private, but they are always open)

Private tracker currently open and will close anytime soon today or tomorrow. See if you like their content https://upload.cx/register

If you are willing to pay, try usenet. Cost is cheap now because of black friday deals.

Edit: Damn milkie cc suddenly closed registration after what 2 years?

Edit1: New milkie invite code https://milkie.cc/milk/BestCowsHere

Edit2: upload cx is now closed