Sure a couple have had issues, but compared to Jebao show many people are still running the same Jebao pump over a decade later? willing to bet almost none, as they will have all failed....You can always find at least a couple bad products from anything mass produced. It’s about how many compared to how many produced and yea you can buy 3 pumps for the same cost, and you’ll have to as they break. how many people have issues with the Jebao? Waaaayyy more than have had issues with mp40.
It’s ok if you prefer cheaply made stuff, but don’t try and convince yourself or anyone else that your cheap china junk is somehow “better” than a tried and true industry standard.