Sorry for late replying.
Since you're using gimx on RPi, you should know that RPi support should be considered as experimental. Logitech wheel driver on RPi not react like the way they did on windows. Try again with gimx and pc to consider the best
When I played this game in the past, I remember camera sometime flicked to the top-down unpredictably.
For me this made game unplayable.
Do you experience the same thing?