Aside from the focus goofiness from the camera -

It’s been said - but the higher density sensors are more sensitive to shake / movement than the lower ones … so the tripod can be part of the issue as well. Some people notice it when they jump from 15 to 50 meg pic’s.

I haven’t used back focus but need to start, I started with a Pentex K1000 back in the day so I tend to run Ap and do my own focusing for key shots, but I need to get used to these “camera thinks for itself” with any newer camera.

I’m eyeing a D850, or Z9 - Nikon guy… but considering Cannon - Frankly Nikon was in big trouble until they popped the Z9 out….
Cannon just got to big headed cutting out shutters too soon….
Both of them have lost sooo much market share due to smart phone cameras they need to be really careful so it’s important to pick wisely…
But if you want landscapes and Zoom quality full body cameras are still the best.