What about it is useless? If it's a lag issue ensure it has the correct current firmware or if that doesn't fix it try to get hold of one of the original bluetooth microphoneless Fire TV ones that came with the Fire Stick v1
I have a cheap air remote like this https://www.amazon.co.uk/gp/product/B014R8EAPG/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1
Works great
This looks ideal for £15 im going to give it a try .Thanks