The problem is that there are no good alternatives. I don't like Apple and I don't want to support them. The Android world is terrible, all devices are locked down and sold by awful companies, or if they aren't, they are probably made by non-reputable Chinese manufacturers.
The only option is to buy a mini PC (like a NUC, or similar) or reuse some older/second hand PC/laptop, and install your own software.
It's not convenient, but the only way you're not going to get burned. And the software is rough, I personally don't like Kodi... I just use it like a computer with a wireless keyboard with integrated trackpad.
The bad part is that even if you block everything on the client side with ad/tracker blocking extensions, there's nothing stopping them from collecting data on the server side.