Years ago (20 or 30), I bought a mitre saw, I find it really quite good
and reasonably accurate. This one:
https://www.amazon.co.uk/Silverline-.../dp/B000LFRXW2

And yet it gets terrible reviews. Now, I've found a review that explains
why:
"I have to say that the quality and accuracy is poor, now that many of
its components are plastic, the original were all cast ally and it was a
good piece of kit"

I paid more £££s for mine all those years ago, so something has to give.