FNIRSI-5012H hand held scope,Anyone else struggle with this?

I bought a FNIRSI-5012H in october 2020, and I think 90% of the times I have tried to use it I just give up and drag out the old analoug Leader…

I struggle to get it to pick up anything or sync to the correct voltage or lock on the waveform, usualy it just give not a lot at all. I expect it’s partly just not great and partly I don’t know it’s secrets. But I am at the point of givving up and getting something better, but can I justify that givin this is a little hobby.

Anyone else got/had/use/discarded one? I know it’s what sam uses which is more or less why I bought it, but he seems to have more success.