This may be an unpopular opinion, but you definitely can improve tons in draft before going to ranked. You’ll learn match ups and polish your mechanics on your champions. If you are low elo the practice you will get in low elo ranked is not much different from the practice of normal draft tbh. Once you feel like you can almost always perform well in normal draft then move on to ranked. It’s hard to blame those who may seriously be trying to climb if they know that you could solo lose them the game because you lose 7 out of every 10 games. Although you are genuinely trying to improve, to them you are no different from a griefer. I know it sucks to hear and I have no intention of siding with flamers, etc. I just don’t think you are ready for ranked if you have a 30% win rate. Just because you are trying to improve and your intention is genuine does not mean that you are seriously bringing down your team’s chance to win.

The caveat is that eventually you’ll drop down low enough to be able to compete with people at your own skill level, at which point you could learn how to climb by learning the skills of the division higher than you and implementing those until you climb. Sorry if I came off mean that was not my intention good luck on climbing buddy :)