Install your favorite flavor of Linux then. Beelink devices have a good reputation for being quite happy with a new OS. It's more compatible that the latest Apple devices, that's for certain.
Apple has never put any technical or legal obstacles in the way of installing other operating systems on Mac hardware. Nor do they assist in any way, it's consistent benign neglect.
The old Intel machines made excellent Linux boxes, excepting the TouchBar era because the TouchBar sucked (it was possible to install Linux, it would display the fake function keys, they worked, but not a good experience). I've converted two non-TouchBar Mac laptops into Linux machines, with zero complaints, one of them is in current use (not the laptop I'm typing on this instant however).
Now there's Asahi, which as a sibling comment points out, will surely be supported for M4 eventually. This is a great time to buy the M2 Minis and put Linux on them, if that's what you're into. Or you can wait around for the M4 port, whatever suits your needs.
Yet they made BootCamp.
Do you see how foolish you look trying to defend nonsense?
Apple try to avoid being too heavy handed in the lockdown because they know the outrage it would cause from their legacy customers. Boil the frog slowly.
But they most definitely are trying to make the Mac more like an iPhone and they would rather not you install any other OS on it.
The bootloader not being completely locked is more for legacy reasons and multi-macOS support (dev/debug) but if you have any problem with it, you will need (surprise-surprise), another Mac for a DFU restore, just like an iPhone.
I have a minisforum minipc. first thing I did was wipe windows and put popos on it. super happy with it. That said, getting anyone who isn't used to linux to usd anything other than windows as easy as pulling your teeth. People go towards whats familiar; Even when what's familiar is objectively trash that spies on you.
I don't try to get others to use Linux anymore. "Anyone who isn't used to Linux" can keep doing whatever it is they're already doing. So long as we can use it, I'm happy. I care about Linux usage only as far as it makes it harder for companies to ignore or block us.