I had the same issue on the toupcam driver on a rpi1: everything worked fine but the toupcam driver. I ended up passing to a newer raspbian on a rpi4. You could try compiling the drivers instead of installing them but I wouldn’t expect much better result.
If You could, I would also weight returning the toupcam for a better camera with better driver support, e.g. ZWO ASI 120 series.