If you're that one guy...

-That doesn't group for objectives -That goes bot for cs while you see the enemy is going for baron -That gets caught out when it matters the most on a regular basis -That doesn't watch the map and what's going on -That doesn't use pings often or doesn't follow them -That doesn't pay attention to cooldowns -That doesn't position correctly

Then you're probably the reason you keep losing, not your team.