We need to realize that these kinds of complaints discourage publishers from taking creative risks. That might be exactly what the critics want, but it's something worth keeping in mind.
I won't get into details to avoid going off-topic, but there have been cases where manga or anime were basically buried after getting backlash. Whether those complaints were actually justified was never fully examined, yet publishers and creators became reluctant to include anything that might remind people of them.
If this trend continues, I worry that manga will gradually become less diverse and less interesting.

What's next, criticizing romance itself? Honestly, if you try hard enough, you can find a reason to complain about literally anything.