- Edited
My 2 cents.
Criticism and opinions can be placed into two categories and then dealt with by you.
Whenever a reader, (which includes other authors, critics etc), gives you feedback on an aspect you need to look at the root of the issue.
"The main character should have done this not that...." e.g. gone to paris, not stay behind in workshop training.
NEVER do what readers tell you to do, but ALWAYS look for the cause of the critic to learn from your "beta readers"
This way you can learn if something is boring, out of character, not enough depth of character, etc and you can make a decision if you want to change. But at least you got the message.
Collating feedback
If one reader tells you a joke isnt funny and four say it is. Then its funny. And vice versa
substitute joke/funny with - understandable, interesting, etc
Ok what does this all have to do with harems?
1) You cannot please everyone all the time. Don't even try.
2) What are the personality and motives of your characters? It should not be you or the readers deciding if there is a harem, it should be the characters. And in that if they did; it would not look like an anime harem, maybe more like a love triangle.
3) Listen to the readers intent, never let them bully you.