Yeah jockey wheel play is a pain on cheap mechs. I was once fixing up a cheap old MTB while in Africa with no access to spares. Terrible shifting. So I made a washer out of very thin plastic (takeaway food pot) to shim out the internals of the upper jockey wheel, reducing sideways play to very little. Huge improvement! No idea if it would last years, but something else on that bike will probably die first.
Sram sx is cold garbage, nx rear mechs not much better.
I actually tried to warranty a 3 week old sx rear mech off a kona that had not a scratch on it, but was so wonky it wouldn't work 10th to 12th. Zyro stated "age related wear is not wareanty". Yup 3 weeks
Yeah jockey wheel play is a pain on cheap mechs. I was once fixing up a cheap old MTB while in Africa with no access to spares. Terrible shifting. So I made a washer out of very thin plastic (takeaway food pot) to shim out the internals of the upper jockey wheel, reducing sideways play to very little. Huge improvement! No idea if it would last years, but something else on that bike will probably die first.