Dutch is worse.
Ach du lieber!
It is more strongly guttural, as in the name of the beach near the Haag (Scheveningen - a word the Dutch resistance used to ferret out Nazi spies since even Germans couldn’t pronounce it correctly). The Flemish version in Belgium is softer. But Nederlands doesn’t have the hard, sharp edges you hear in German. If you have a dog try giving it a command in English first and then switch to the equivalent in German. They generally react more strongly to German, almost as if you’re cracking a whip as you speak.
Dutch has a lot of hard consonants - it is very hard for me to follow at all.
In the video the guy who represents German is shouting/spitting the words, pouting and banging on the table. of course it sounds harsh that way. All some people can think about when the topic of the German language comes up is remembering seeing some old video of Hitler. Seeing that example, they think Germans shout like a raving lunatic. A madman shouting and ranting in any language will sound harsh.