You know what? It's probably not terrible.
I have one that looks just like it, but different branding (seems this model is heavily OEMd), and it works okay. Better than a few other supplies that I've tried that have issues responding quickly to quick changes in current-draw.
For bring-up stuff, I use an old high-end HP PSU (finer control of the CC limit), but when I just need 3.3V, etc, this is my go-to PSU. Simple, and works as advertised.
Inside yours looks typically chinese. They've done cost-cutting, but the only obvious thing wrong I see after a quick glance would be the naked solder-tabs on the ON/OFF switch, which would be live mains. That should be covered with heat-shrink at least.
Apart from that, test it out before you get rid of it. Put some load on it, and look at the ripple (if you have a scope), and how precisely it's calibrated with regards to voltage and current-limiting with a multimeter.