Why do people not buy wards and not understand teamfighting?
So I got into League pretty recently and last season I went 3-7 in my promos and got Silver V which I was very happy about. This year I go 4-6 and get Bronze V (thx rito for knowing how to count). I have heard bad things about it and lord almighty are they true. This isn't a thread about "everybody sucks but me, too hard to carry noobs" so keep that in mind before you comment. I played many games in bronze V and nobody wards. Every game I buy a minimum of 5 wards and no one on my team buys wards. The most anyone on my team ever bought wards was a person that had bought 2. You might say they don't give you combat stats but its like life insurance. You place it in a bush and the jungler won't gank you. Way better than facechecking like an idiot. This leads me to my second point, why don't they understand teamfighting? For example, a tank engages and they ALWAYS target the tank. It doesn't matter if they have a fed adc in the backline killing all of us. If I engage the teamfight as a Udyr or Nasus or Singed (my main champions) and try to kill the ADC or try to flip him or slow him so my team can kill the ADC THEY STILL FOCUS THE TANK. How do I let them know what to do politely? Also, 1 last thing. When I play any champion that is very good at splitpushing and I splitpush and when they send 2-3 members of their team I am constantly spam pinging and telling them to go mid and push the towers because there is very little defence and they just ignore me. Any tips?
TL;DR: How do I deal with teammates that don't ward? How do I help my team understand who to target in teamfights? How do I tell my team politely to push mid when I am splitpushing?