Do your teammates become more trustworthy as your elo increases?

Title^

Doing a three man stun and chunking more than half of their team's hp, only for your teammates within reach to ignore what would have been an easy 4v3, and then you get killed by getting collapsed on.

Pinging OMW to your Full hp Evelyn that is getting invaded by enemy Jax, but she prefers running away from me instead of toward me, wasting your time and eventually giving a kill to Jax as i'm too far away to help.

Chunking 80% of the enemy adc life, only for your adc to tunnel onto the tanky support while you're getting pummeled on.

Your adc gets jumped on by Leona, so you ult and chunk most of the enemy adc's life, but instead of helping you, your adc prefers to flash away because he lost a measly 100hp from the Leona, letting you die.

After killing the enemy botlane, you, your adc and the jungler decide to push their tower. I see the enemy midlane Gangplank on his way, i ping him to alert my teammates of his presence, and ping again when he's close, i chunk him for almost all his life, and my teammates flee for some god forsaken reason. Not a spear or heal was given by Nidalee, and not a single Q from Ez, and both were healthy. I proceed to die from the very low hp GP as i don't have enough damage to finish him by myself.

All of those exemples are stuff that happens way too often at my elo, and i was wonderring if it gets any better at higher elo. One of the most common mistakes i make is trusting too much my team when it comes to making plays.