Agreed with OP. I made a thread on this topic a few months back.
https://forum.square-enix.com/ffxiv/...ontline-please

Asking other things I argued for premades to be matched only against other premades. The only people who oppose this solution are players who are themselves members of such toxic premades. They rally against any discussion that would change the status quo because they only play FL so they can explicitly stomp other players. They're not interested in balance, sportsmanship or the enjoyment of other players.

So, be prepared to deal with a lot of bad faith arguments and time wasters if you want to discuss solutions to the premade problem.