So there’s three things going on:

1. Rutte’s broken English means he didn’t understand the nuances of “daddy” versus “papa” in Dutch, which doesn’t carry the submissive undertones as much as the former.
2. In the Netherlands he’s known for his very casual and informal personality (“he’s the world leader that cycles to work!”). Dutch business culture is more relaxed, so here it works, but internationally it doesn’t.
3. He’s always been like this much of a bootlicker with Trump, even back during his first term. He really wants to be on good terms with the United States, so when Trump is in charge he always kisses the ring.