Frankly that's pretty standard for supermarket / DIY store stock. You were unlucky - the normal failure mode for those switches is the contacts welding closed on high inrush loads.
The soldering is pretty crap, but effective. The cable strain relief is suspect (you want one with visible screw clamps). The VDR does have a thermal fuse heatshrinked in close contact but soldering the PCB to potentially flexing contact strips is not great.
I think you'll struggle to find better without close examination, or buying a more 'pro grade'. Check ebay for used server rack power distribution strips.