Maybe riot should design the game in a way that rank up means you learned something.
First, don't worry if you don't know what is control wards this is riot fault.
Second, no. Wards and vision control is not the support job, IS THE TEAM JOB, but don't worry if people think it is support job. Again riots fault, the game has no learning curve, the design right now is bad.
3- don't play lulu. Just don't, trust me I used to like her, it was insane to protect all the team. Right, you can't even protect yourself and you do no damage so you are basically useless.
4- do you really want to keep playing lulu ?(it is fine to do).... well, be ready to get tired, yes tired. Is hard, you need to think that your team is made of a bunch of babies that will do s. All the time.
So you need to think " this guy (just being nice) will go and think s/he is god so I need to be ready to do that, their team have this guy strong so I save my polimorph but wait they have morgana so I wait for the shield to make sure I use on the right time, when the fight starts I use my itens to start the heal and prepare the shield. Once they used all protections I can ult to knock up and timing with the healing....
Yeah, this why I stopped it was a nightmare to carry games, stress and exauhsted all the time.
If you are fine with that, keep playing, improve your vision and make sure to know your team, because yes, they are a bunch of ....
Otherwise just take a damage sup and do what riot wants.... DAMAGE DAMAGE DAMAGE.