Well your only alternative is Kdenlive, which is a very unstable experience. There are some alternative video editing software on Linux, but they follow the adobe model of, give me your money forever to use it. Resolve works, just need to tune your injest to get the video to work. I have a bash script I can send you that batch fixes videos which I can send you.
As for apple machines. I get the distain as I too don’t like Apple, and feel their locked in software, hardware, and ecosystem is overpriced and unreliable. But the way I see it, if the computer is for work, which this appears to be, I need the best machine for the job, and Apple unlike Microsoft and Google, has very clean software and hardware that I can trust for professional work. No ads, very fast hardware, stable, with no compromises.
That said I will not use them for personal use. Hence the switch over to Linux. I would’ve got a Mac Mini for work if I had the budget for one.