Political advertising just makes democracy look like a total joke. If you can buy votes by shoving ads in peoples’ faces that’s not a democracy, that’s an oligarchy.
Germany doesn't have negative ads criticizing opponents (at least it didn't have them when I lived there). This makes them refreshingly boring. I would guess at least 90% of the US ads are basically "the other guy is bad. Be afraid" without much content. Getting rid of the negative ads would help a lot.
"The Impact of Negative Political Advertisement on Voter Behaviour in Germany – an Experiment"
https://www.kas.de/c/document_library/get_file?uuid=f8324712...
"Negative campaigning has been a feature of German political campaigns from the very beginning of the Federal Republic... the central idea of this paper is to examine the considerable difference between negative campaigning in Germany compared with that in the US."
It seems like you're correct that German political ads are almost never US-style 'attack ads' because among Germans, "negative campaigning in Germany is much more risky for the attacker than the impact it may have on the attacked party"