I disagree. I find point clouds useful, as long as they are not pure black. Kernel density plots are better, though.

But Lumifer gave you a concrete suggestion: plot a regression curve, not a bunch of buckets. Bucketing and drawing lines between points are kinds of smoothing, so you should instead use a good smoothing. Say, loess. Just use ggplot and trust its defaults. (not loess with this many points)