I'd say the biggest problem with the support role (especially in lower elo) is that players feel like they can't do their job right even if they use all possible resources.
Only 1 pink ward max, visible and easily taken down without protection.
1 trinket covering 1 spot on the map for only about 50% of the time, until you get Sightstone or Blue Trinket, which is 800g or level 9 (which we all know supports reach WAY later than other roles)
No purchasable additional wards.
This means only 1 or 2 wards on the map early game until mid-game UNLESS you give up your early support item upgrade (which I think is risky af). And then you get flak from your adc for allowing him to get ganked and killed while he still has 2 yellow trinkets in his inventory.
Add all of this bullshit on top of the fact that Riot makes you play the role almost guaranteed if you even give the slightest hint of interest in playing the role. And by guaranteed I'm talking 14 times out of 15, and that one time you get jungle or whatever other shit, someone dodges anyway. <- True story