Why buffing the Marksmen-class' early game is a horrible idea:
Think about it: Twitch, Vayne, Satan[Teemo], Jhin, Caitlyn, Jinx, Lucian, and Quinn will just turn the game into a hellhole.
The whole point of support is to help ADCs/Marksmen reach that late-game carry potential. Hence why tanks are so helpful for ADCs. As an ADC living in the tank meta, it means the meta is actually healthy because it's not about who deals so much damage. People can peel for me and I can sit back, right-click, and murder!
Haven't you seen a good Twitch or Vayne(Gosu)? Haven't you seen how outrageous Caitlyn traps are(I'm tilted by her placing 4 traps around my tower)? Have you seen the combo Quinn has? Have you seen Lucian's combo execution speed? Have you seen Jinx on steroids? Have you seen Jhin's damage?
Marksmen will not be buffed early game unless there is a huge fuck-up by Riot. Especially since Draven still exists as an early game bully.
And let me warn you, if you buff marksmen:
is coming and there'll be nothing you can do to stop them.
The only issue you should have right now is how bad your team composition is. I like to go tank so I get my ADC and jungler fed/peel for them so they do damage. I hate squishy, snowballing mid-laners and I hate how easy overrated champions like Yasuo are to destroy.