I’ve had this experience specifically with Wolt in Germany: sat in a busy restaurant with sit in diners waiting 2 hours for their meals while the kitchen seemed to be catering for a constant stream of Wolt drivers.

And the real kicker is that of course since this is Germany all the negative reviews have been sued away, including my wife’s very moderate 3 star review. Of course German restaurants will claim it is libel if you write that you had to wait for your food