Why can't I carry as jungle or support anymore?

So in season 5 I primarily played jungle and support and had some pretty decent success with it. Sure I wasn't amazing but I felt like my stats were really good and I had a strong impact in every game.

This season, not so much. Support is a complete lost cause. If I don't play a carry support like Lux or Brand I literally have a 0% chance of winning unless I get paired up with a smurf or premade who carries. The jungle isn't much better. I always feel underfarmed and underleveled. This in part is due to me "being too nice" and always trying to give my teammates the kills but it seems much more punishing in season 6 than in season 5. On top of this laners are notorious for taking jungle camps and yet will spam ping me away if I soak up a minion wave that is going to die to a tower anyway while they are in base. Keeping up in levels is a huge struggle and even if I have an extremely high kill participation my gold income is usually pathetic compared to the solo laners. In essence, I always feel like I'm behind when I'm in the jungle.

When I play jungle or support It feels like even if I play amazing whether I win or lose is often more determined by my allies than my own play. I don't ever feel like I have as much of an impact as the other roles.

At first I thought it was just me but when I play top/mid/ADC I don't have these problems. I'm able to carry easily and I win the games I deserve to win and lose the games I deserve to lose. So prevalent is this disparity that I've converted over to an ADC main and I'm in the process of dropping jungle as my secondary role in favor of mid lane.

Carrying from the jungle and support role feels much, much harder this season and overall the roles feel much less impactful to me. Has anyone else had this problem? If so, what do you think is the cause?