If anything, it's quantum that has been poorly treated by generations of explaining-away. The world of the tiny must be predicted with probabilities because there is no way for us to observe it directly. It's not rolling dice ... we -have- to.

While trying out models of what it's doing boggles our minds, our limitations mean we cannot decide whether it's really deterministic. Reality isn't limited that way. (Einstein was right.)

Some astronomers recently took a clever look for whether space is quantized into a 'froth'. They studied monochrome light from stars 18 billion light years away, at redshift z=2.34. They found evidence of quantization into froth in all that time. https://arxiv.org/abs/2001.06016

EDIT: That should have read 'NO evidence of quantization' in 18 billion years of travel.