Generally this forum is intended to help with KiCad related questions (what function use to reach something, why I get this or this Error, how to move my library to new version and so on) and not how electronic works or how to design PCBs.
Just yesterday we had question like your:
And the other 4 days ago:
The better place for such questions are general electronic forums like EEVBlog for example. I believe more people will look there at your PCB.
For me (in some PCBs I see) surprising is how small vias people use. My minimal (not in thermal pad under ICs) via has 0.4mm diameter hole with 0.2mm annular ring so my vias diameter is 0.8mm.
In your PCB surprising is why you use THT resistors while using other elements SMD.