The most tilting part about ranked is.

Starting a match and seeing your ADC feed a kill before 4 minutes into the game, and fail to ever catch up due to bad mechanics or macro.

Even worse when you then realize that your jungler isn't actively ganking other lanes in order to get them ahead to make up for the lack of an AD carry, and falls behind himself due to the shit exp which jungle camps give this season, thereby remaining useless for the remainder of the match and feeding every time he gets caught out due to being underleveled.

When you realize that 60% of the team hold close to 90% of the power to decide the outcome of the game, and you prefer playing neither one of the bot lane roles or jungle, is the most tilting aspect to me.

In this meta, it's either get your bot lane ahead or have an amazing jungler who knows to not gank a losing lane but help another If you aren't getting either of those on your team, be prepared to lose a lot of unwinnable matches because you can't teach a bad AD carry or a farmville playing jungler macro over the course of a single match.

When people with shit map knowledge fall behind they remain behind. They never get to catch back up. They never do stop feeding.