Years ago (20 or 30), I bought a mitre saw, I find it really quite good and reasonably accurate. This one:
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.