I mean let’s not pretend that it’s odd to not want to accidentally come across poly and asexual in a storyline that seems, from the start, to come across as otherwise. Monog and not ace is the norm, and yeah that is part of why people complain, but also people want to have the storylines completed properly
This has, from beginning, seemed to be two different couples. For them suddenly to merge and become poly at the end would be very unexpected, and because it wasn’t written in a way to come across that way, people will likely have negative things to say
Call out anti poly and acephobic behavior if you see it but also let’s engage in an actual discussion and not be passive aggressive and make micro aggressions/imply it’s bigotry reinforcing peoples comments unless there is obvious anti in their comments