Most hardware companies are just terrible at software in general. Camera makers are pretty average in that regard.

Usability of the camera hardware and software ecosystem is another matter. I think the common wisdom is that most paying users don't want beginner-friendly, they want powerful and familiar. So everything emulates the paradigms of what came before. DSLRs try to provide an interface that would be familiar to someone used to a 50 year old SLR camera, and Lightroom tries to emulate a physical darkroom. Being somewhat hostile to the uninitiated might even be seen as a feature.

It's also like 4 digital dials. And you can leave most to Auto until you realize each specific dial enables something you desire. Sony tried "non-scary automagic" approach, and have instantly gone back to dials.

There's also Sigma BF if that's what you want; Sigma actually do pretty good job from perspective of minimalistic, idealistic, on-point, field usable UI, though the return of that effort just isn't worthwhile. I have the OG DP1, it feels natural as IntelliMouse PS/2. I've tried dp2 Quattro once and it felt natural as any serious right-handed trackballs. They scratch so many of camera nerds' itching points.

Most people just buys an A7M4 and an 24-70 Zeiss. And then they stupidly leave it all to auto and never touches the dials. And it puts smiles on people's faces 80% of times. And that's okay. No?

Yes, fully agreed. However, the way the companies currently approach this - catering for the ever-reducing niche, will end up killing the DLSRs over time. They just don't offer enough over phones, and the UX/SW being so crappy alienates the potential new userbase completely.