I didn't realize Fuji was still having AF problems of that magnitude. Not being able to trust the camera's focus would be untenable for me. I can see why you're looking around.
The biggest part of fuji users doesn't report this issue and i'm very happy for them because is a fantastic system but there are some (like me) experiancing it through different models. They released two firmware updates, so i'm not talking about gosts! The H2s (withous this issue) is a fantastic camera.
I have a good friend (pro) who shoots Canon for work, but has a nice (extensive) Fuji system for when he travels. He likes the size and form factor. I've tried a number of his bodies over the years and the thing that always stuck out to me was the sketchy autofocus. That, and the fact that I could never get along with the ergo (but the latter a person can eventually adapt to at least).
Glad to help. Holler if you'd like more recommendations!
R2
I had the chance to try an R6mkii + 35 this morning, and i bought them
Thanks very much for your suggestions
Awesome! Big congrats on the fine purchase!
Now you just have to set up the focus to accommodate your style!
Do you use the shutter button for focusing, and have you ever tried the back button(s) for this?
I take focus off the shutter button completely and set the AF-On button for Face/Eye/Subject Detect, and the * button for Spot AF (both are set for servo, which I think is AF-C in Fuji-speak). Lifting your thumb off the button then stops the AF when desired.
Note: when customizing the buttons, be sure to press the "Info" button when prompted, which takes you to another page of AF customizations (you must select your choices and also checkmark them!).
The entire menu is in Canon-speak, so it'd be best to watch a few YouTube setup videos for starters. Best of luck, and holler back with any questions!
Enjoy your new kit!
R2

R6ii autofocus during a bike race (with RF 28-70).

R6ii in the field (with RF 800/11). 100% crop, click on "original size"

R6ii BIF (with RF 800/11).
Samples provided to whet your appetite! :-D