they have been actively supporting for the current CDU-front runner in bevoming the CDUs candidate over more moderate options (Merz is on the right of the CDU, the big conservative party in Germany: https://bildblog.de/104902/bild-am-rande-des-merzinfarkts/
this was their front page just now (we have a national election tomorrow):
There is honestly a lot more I could put here. In Germany the Bild is well known as a populist right wing paper. It is not exactly new either. A famous quote from the Punk-Rock song 'Lasse Redn' (2008) when describing the papers content is "Angst Hass Titten und der Wetterbericht" (fear, hate, tits and the weather). The common hastag when talking about them in left-leaning circles is #haltdiefresseBild (shut up Bild). There even is a Browser extension dedicated to block all Springer owned or published products.
While some of its other papers seem more nuanced at fist glance, they often push similar narratives packaged for their respective audiences.

You can predefine keywords/phrases, yes. But there are many other options. You can tag different documents based on how they wherer ingressed (which e-Mail they came/were sent to from for example).
I have it set up so that my scanner has a few different quick action buttons which atomatically upload the documents into different folders (think bills, helthcare, bank, etc.) Then paperless tags and sorts them based on those folders.
I also does machine-learning when enabled which works ok in my experience.
Tinfoil hat time:
That Ace account is just an alt of the original guy and rage baiting to give his posting more reach.