Need some help; on a losing streak.

Hello.

So, I started playing this account again, and I came back hyper carrying with Mordekaiser. Now that I'm level 24, I either will still do really well... Or realllllyyyy bad. Now, some of the awful games are from bad connection(Comcast), or my laning partener going afk, BUT I've also recently had bad games with no lag, trolls, or afks.

My Mordelaiser plays arent working. Ill do well early, but I die ONCE and Im screwed. Maybe its because Im playing with my level 30 pals sometimes, and am outruned and outmasteried.

I try to farm it out, Im ganked and dived. Always focused because I ALMOST kill them, or I just wont die(ghost and heal on Mord huehue)

Perhaps I am doing something wrong.

On another note:

That moment when you play a late game champ, but people on your tram want to surrender at 20 just because the enemy has more kills(even if we have more objectives). THAT MOMENT WHEN YOU HAVE AN ITEM RELIANT CHAMP AND YOUR TEAM OUTVOTES YOU TO SURRENDER AND YOU LITERRALY ARE HALF AN ITEM AWAY FROM YOUR CORE

D:< On such tilt.

Tips?

Ps-Im not changing my champ. I play Mord and Olaf the best. I can only play melee champs with sustain.