I'm surprised you've had such a different experience with them. Their circular saw certainly isn't anything special (Not terrible, nothing special, probably overpriced to be fair.), but for me the mitre saw on their standard universal blade has been accurate for me. Especially with the measurer - I can cut multiple pieces, stack them up and they feel the same length to the touch. The depth stop is worthless of course, I never rely on the laser and I've never checked to see how accurate the angle stops are, but for straight cuts mine has been at least very repeatable.I have to respectfully disagree. I have an evolution mitre saw, and an evolution circular saw, they aren't aweful for the money, but IMO they aren't that great, I don't find the mitre saw accurate enough for anything more than rough work. The normal advice is to buy a better blade on any budget saw, but because they are designed to cut anything, they spin slower than standard saws and so you will never get the best cut. These are things I wish I'd realised before I bought mine
I will say that mine is a very old (Over a decade old) model so it's possible that they have changed over the years, or maybe their quality control was poor and either I got a good one or you got a bad one. (Which isn't a great sign if they are that variable in quality) Having said all of this, as others have mentioned they do have an older rail design which isn't ideal for a smaller workspace.
But for the sorts of projects mentioned and the budget, my thought was that a cheaper (And more universal, being able to cut steel) mitre saw for the quick and rough jobs paired with a decent track saw for precision work could be a good option.