Would "Guns for Hire" be so disliked if they had used relatively unknown actors for the royalty roles?

It seems most people bring up the presence of Lizzo and Jack Black when they are saying why they dislike the episode, so I'm curious if it's the story itself that people hate or if it's the "oh no, big-name actor cameos" that people have an issue with.

(Personally, I had no idea who Lizzo was - still don't know much beyond her apparently being a singer - so I didn't even realize she was a big name until other people were talking about it; and I thought her acting was about on par with Gina Carano: not the best imo but not distractingly bad. Jack Black was clearly having a blast and I LOVED that for him! So their having the roles didn't bother me at all.)