Show appreciation to a good mid laners, please.
You don't know how much mid laners win the game for teams when we do 90% of the work to win mid lane, and then go bot lane and win your lane too, and then go top to win top lane while counterjungling the enemy Amumu. We keep up our words of encouragement even when the team wants to give up. Even when you're feeding 0/10, we tell you "you're okay, you can do it!" and then we gank you 3 times until you go from 0/10 to 1/10 to 8/10 to 16/10, until we win the game. Even if the whole team is 0/8, 1/3, 1/10, 2/6 your mid laner is 26/3 and doing our best to win the game for you. We never rage in game, or complain about anything, we just take everything that we get and try to make the best out of it while encouraging others to do the same. The bot laners might be calling us "fucking noob KSers" or "KS idiots" and we will continue ganking them and helping them while ignoring their constant jetstreams of insults and curse words. We don't complain when we get KSed. We try our best to shotcall even if the team ignores us for no reason. And no matter how frustrated we are, we still keep trying our best to encourage everyone with positive words and positive performance.
It really sucks sometimes when you feel like your effort is being ignored, especially if the teammates also shout abuse at you for being a "noob KSer" and kicking your back as you're carrying them. People say that support is a thankless job, but I think that mid lane is the real thankless job, and you can change that by showing appreciation (it could be something simple as much as saying "thanks for carrying" or "thanks for the morale boost"). Really, just one word "thanks" can make someone a really happy mid laner, especially if they're someone with very strong League dreams and wishes to become a LCS player. Just that one word shows them that you value them as a teammate and that you respect what they do to win you games, and to a serious League player it's really important, especially a player who has plenty of friends who will be graduating college and moving away after this semester.