Why is league so team oriented when ranked is focused on SOLO/DUO QUEUE

I've been meaning to make a post like this for a long time but haven't found the right way to word it. As I become bored and impatient easily here's me whining about league in a very long post. Long story short: League is to team oriented( IN my opinion) Long story long: In my opinion league has become way to team oriented and virtually impossible to carry a team. When league first came out it was always a team based game. It was about working with 5 other players to reach a similar goal of destroying the enemy nexus. Back in season 3-1 a player could hold their own in a solo queue ranked match and eventually win the game. Now I'm not saying they 1v5'd and single handidly won the game, but what I'm saying is they didn't need to rely on another player to be able to win the game. Now here is where I have a problem. As we head in to seasons 4-5 League becomes even more team oriented, a little to team oriented.(EX: Now a player can only place 3 wards so they must rely on their team to cover the rest of the wards needed) Now of course this is all well and good if you are doing a ranked 5's or if you are in a competitive league such as the lcs. You can tell those players what is needed to be done, and if your team is good they will listen and you will most likely win, but obviously this is not the case for solo queue. I can't force my full Ap support cho'gath to buy wards in fact I can't force any of my team to do that and they know that. Although my feeble attempts to get good wards around the map covering important objectives I must stop at the 3rd ward, and I guess so will my team. As a silver ranked player I have yet to meet someone that buys wards and it really bugs me when they don't. Sometimes it can even lead to the defeat and loss of my hard earned LP. Although this is only one case. Let me set up another situation. You are the adc, and you have that amazing, fresh from bronze, dark horses brand support. Now what brand support doesn't realize is that turrets hurt level 1 and he ends up going 0/3 5 minutes in. Now in my opinion the Adc should still be able to win lane with their individual skill, and knowledge of the game. Now obviously thats not going to happen because that adc NEEDS the support, and without a decent support the adc is automatically screwed for the rest of the game. The enemy bot lane will snowball, roam to other lanes and their goes the game folks because brand support died early game. Oh but I'm not done yet. Lets say you are top lane Tryndamere. Now you got fed early game by outplaying the enemy top laner and now 20 minutes in you want to split push. Now obviously split pushing isn't an easy task and you are going to need the help of your teammates. You type in chat "you guys pressure mid, and I will push top at the same time and if 2 come top dive mid" Now you see your team set up for the push and you happily begin pushing top. 5 of the enemy team collapse on you and kill you. Now you are upset that you died, but happy because by now your team should have the inhibitor, right? Nope Cho' Gath's farming red buff, Vayne and Jarvan are sitting in base, and thresh is feebly trying to get the first tier tower. I realize this is just a giant whiny rant from a silver player who probably has no clue what hes talking about, but hey I was bored.