With all due respect, you have 40 hrs playtime lol it's normal to struggle on streams at your level. Higher refresh rate monitor is nice to have but don't fall into the trap of thinking that it's holding you back, you can get really good on 60hz
Seems a bit early to worry about streams. I'd focus on mastering all the basic patterns first, and getting comfortable with longer and longer bursts. You've got a lot of pass plays in your tops, so maybe work on your acc more.
At least in my experience, I tried to rush into learning streams early starting with like 130 bpm practice diffs or smth back when my fundamentals still sucked and I kinda regret it, I don't think it's worth it until you can start at like 160~180 bpm at least with decent acc. Until then it's probably a better use of your time to improve your bursts instead