In all of these games you are dying quite a lot (5+ deaths/game). Have you identified what is causing you to die in those scenarios? If not, start paying close attention to that and see if there is a way you can come out alive in those scenarios.
I also notice that you are very successful on bruisers/tanks like Maokai, Amumu, Mordekaiser, Nasus, and Jax, but you have a large pool of champs which you have only played a few times, and usually lost with. If you can try to secure your best role and pick a champion you are strong with. For me, once I started playing to my most comfortable champion archetype (ranged mages) I started winning a lot more because that playstyle fits me far better than the other champions I was trying to play. If I am forced to go into a role that doesn't allow me to play mages (jungle and adc) I have just one or two champions which I always refer back to that I know I can perform consistently with.
If you are interested in some hands-on coaching, please add me in-game. I would love to work with you and help you figure out what you need to do in order to improve.