Some components, mostly capacitors, have the wrong hole spacing for their pins, and leads were bent to fit. That suggests part substitutions during assembly. Many of the through-hole components were not pushed all the way down into the board. That suggests overworked assemblers. This was obviously hand-assembled.

The author makes a point that there's a clear division between the AC line side and the DC side. That's required for UL approval, but power supplies do show up without it. The power transformer that crosses the boundary should also have a split bobbin, so the AC line side coil and the output side coil are separated by a barrier, not wound on the same bobbin.

There are worse power supplies.[1]

[1] https://linustechtips.com/topic/515473-teardown-and-review-o...