
@ptrc "small bus" is the key here, any vehicle like that is (almost always) privatized.
Also depends on your definition of worse, they typically serve routes abandoned by municipal transit (or complement municipal transit), with intervals that actually make sense. For example, municipal bus can depart every two hours on schedule, while a marshrutka would depart the terminus as soon as it is sufficiently full (which might mean intervals as low as a couple of minutes in rush hours, especially on feeder routes flexibly adapting to mass rapid transit arrival / departure on suburban routes).
They used to almost universally be served by Gazelle minibuses, but in the late 2010s at least in Moscow region many operators started switching to the equivalent Mercedes vehicles (much welcome because one can stand in Mercedes at full height without having to keep their head down) or to Gazelle Next (Gazelle Next Citiline in Moscow, where minibuses were nationalized and integrated ~15 years ago but are still called marshrutkas; and also Citiline in some other cities around Moscow).
It's just that they all look similar to your photo, and I've just realized that I've never seen them in Germany (but saw them in Italy as a privatized minibus connecting a bunch of villages in Lazio to the train station, mostly serving school kids when we were talking it)
@LachAnonym @IngaLovinde in this case it's not an on-demand line actually, it's a standard line with a 20 minute schedule each way, all day from 5 until 22 ( which is an amazing schedule, not gonna lie ); however, the on-demand lines are also a really nice touch, with taxis provided by the city if they can't send a proper bus
and to me, the main difference between what we have in Poland vs Russian marshrutkas is the "privatized and with no proper schedule" part - Szczecin's ZDiTM, Poznań's ZTM, Silesian Metropolis' ZTM and Warsaw's WTP all run small buses as part of regular scheduled lines within public transport