Team Balance and Skill Levels Need Working?

Hey Everyone.

I've recently been on a 6 game losing streak in summoner's rift normal, however only 2 of them were partly my fault.

All games included Ryze and Ezreal, Ezreal being my main (AP). Every single game, (except 2) I did good, and had a positive K/D/A. However we still didn't manage to win. My entire team couldn't figure out when lane-ing phase was over, trying to take out outer turrets while the mid inhibitor was open. While in team fights there was always people in lanes completely away from the fight. When pushing, my team would always start at 5 people in a single lane pushing (when inner and outer turrets were gone) and would get lost on the way to the enemy base, by things like obvious bait, unnecessary jungle buffs, an enemy at low health, all the way across the map (which they didn't reach, or if they did, just traded), and never continued to push when opportunities arose.

I feel as though some of my team's players (not always all) didn't have the required skill level for the match, and always lost. Please correct me if I'm doing something wrong, but I feel like losing a 20/5/4 game with legendaries and enemies having negative scores are sliiiiightly to blame on my team.