The point is no one likes to support, nothing else matters, nothing you say nor I say or anyone else says. That is fact.
End of the line, no one likes support so if you sup main or secondary or fill, you get support. The fact they give people options now allows people to further alienate the role, and now that people willing to support are getting tired of it, it is getting even more alienated.
Riot basically has 2 options else this will fail.
A. Make support actually worth playing, yes there is people that enjoy it, but if the majority don't. It probably wouldn't be too far fetched to say less than 5% of people actually enjoy support, and probably less than 10% that tolerate it. Then it isn't a fun role, simple as that. My suggestion would be at least quit gold starving the class. Give them a way to have a support only item that can't be abused that actually gives them gold. People hate that they are underleveled and poor as support, just making items like
or
actually have good gold incomes would fix a lot. Make Talisman give like 80% of a minions worth if you are nearby and make Frost Queen either raise its x gold per 10 to something actually worth a damn, hell I would say 50, 1 minute is 300g, that isn't gamechanging. Or make it increase your passive gold, hell make it 2-10 added to your passive, if you get 1g every second, make it give 3-11g per second randomly. Just examples but point stands.
B. Get rid of support entirely. There is a lot of champs that are PURPOSELY made weak so they can support since Riot doesn't like when supports solo lane. So get rid of supports entirely. Throw ADC to mid lane where they are alone to farm as they please and make bot lane a double lane of whatever the hell you please, mages, assassins, tanks, whatever.
While some can be debated since yes some is opinion, a lot of that we all know is true. People just don't like support, make it better or get rid of it is basically all I can think of.