Support mains and Arcade Missions

Is it just me or does Riot seem to have taken a U-Turn, after claiming they wanted the support role to seem more valuable to the team by adding support measures, such as shield count on locket or self mitigated damage.

The arcade missions, one is not possible to complete unless you win 4 games with 100+CS, so how are you supposed to do that as a support. Even running a relics support, I'm averaging 60CS in a longer game. It just seems a bit harsh to supports, even more so that this is a lvl2 quest. So as a support, you not only miss the lvl2 reward but any rewards for after that.

It just seems a bit unfair, maybe they can justify it saying that the arcade skins aren't aimed at supports, but then by extension the star guardian quests should have challenges like 'shield your team for 30k dmg, [or] 2k in a game' or similar.

I don't know, this wasn't supposed to be such a big thing, just an aimless tweet that got picked up and they told me to post it here.