I don' have very big hands. But they are not small (18 cm from the top of my middle finger to my wrist).
Sometimes I keep hitting the Q button by accident, but not very often.
The problem that I had with the x-t30 was that the grip bump on the right side of the camera is too small, and I didn't feel safe holding the camera with just one hand and the 18-55mm kit lenses. I bought a grip (not the fuji one, but a replacement that I found on amazon which was a third of the price), and now it feels ok.
In attached photos you can see the camera with the grip and without the grip and you will see what I mean.
Despite this ergonomic problems, the camera is amazing and I'm very happy with it.