Firstly, I think you have a great mentality when it comes to your main role. You have a preferred role, but you also understand that you will not always get it and you have a back up plan.
It looks like you like to play Naut. In the current meta, he is very strong in both support and jungle roles. I didn't look around too much in your profile but it looks like you usually build your support or jungle specific item then you go for a tanky item like Randiun or Frozen Heart. If you are supporting, I would recommend going for more supporting items instead of just getting tanky. Righteous Glory or Iron Solari would by my first choice. However I would only build Solari if you are going against a heavy AP team.
I have played a bit of jungle Naut and I build Righteous Glory immediately after Cinderhulk in almost every situation. The ganking potential is crazy. Instead of using your hook to engage on someone, you can just sprint directly up to them and snare them with an auto, then follow that up with a hook if they get away.
The most important thing to remember is to also be watching yourself and being aware of your mistakes to improve in ways other than just mechanics or item purchasing. If you can find flaws in your own play and correct them consistently, you will inevitably get better. Keep a good mentality even when some baddie is raging at you. He is probably wrong, and he is definitely going about telling you in the wrong way, but maybe you could have played around his poor plays in some way. I think this kind of mentality is extremely important for a support player to have, simply because it is not only about how you play against your opponent, it is about how you play together with your lane partner.
Hope this helps.
