Any reason for the odd sizes of the annular rings?
Example: Q13 and Q1 both seem to be TO-220 packages, but the annular ring on Q1 is tiny, while it is fine on Q13. Q1 will be hard to solder by hand.
The annular rings for the slide switch on the bottom are also very small, will be very difficult to solder.
For hand soldering, you want pads the pads to look like Q13 or D9; a bit meaty. For room constraints, you make them oblong instead of round, such as with Q13.
Looking at that board, and the size of the annular rings on the THT components, I would expect that board was intended to be wave soldered.