Really depends
thai dramas has a nack for making side
couples be the delicious eg min/kit win/team forth/beam and zhao freakin jackand etcetra etcetra i most of the time love the side couple more than main couple but not in mangas
It's a fact that it depends. It changes for every story so it's not a matter of agreeing or disagreeing.
Maybe because the longer you read it, the more mistakes or faults you find. Like meeting someone for the first time and they seem really nice but the longer you know them, they’re are actually totally different.
Unpopular opinion:
Side stories are better than main stories.