When you're losing lane..

Build defensively... When the entire enemy team deals have magic damage build a damn mr item, i don't care who you're playing.. you dont have to go super glass cannon every game and end up feeding more.. sorry just kind of a rant -_-

Just gonna add something on to this.. not every game is winnable.. when the enemy's chogath is 4/0 against your riven and their kat is 3/0 against your xerath before 10 minutes in.. support can't make enough of an impact to carry that.