Google Sheet excels at many other tasks, but it's not a replacement for specialized tool (and it should not).
In the end I put on my robe and wizard hat and used matplotlib. (╯°□°)╯︵ ┻━┻
Observable if you want an interactive, hosted visualization notebook (and all their libraries are open source, except their UI). Plotly, Observable's Plot library, or D3 if you don't mind JavaScript. Can bundle libraries + data + visualization into a single html file and deliver that as an interactive report; once you have the base template down it's decently ergonomic.
Plotly is my current default when I'm working with Jupyter, though. Sane defaults are nice.
Not just sheet sizes, but Sheets feels much slower and has a vastly weaker toolset. Just the fact that the browser takes precedence for keyboard commands from the web app makes the usability suffer massively.