mouse zoom calibration problem, mouse zoom levels edit problem

I am horrified about how ...... COREL is !!! used X4 X5 X6 always the same problem !!!

- no way how to calibrate zoom levels , increments, call it how you like

- zooming 1% 5% 10% 25% 50% 100% 200% 400% 800% zooming level on MOUSE WHEEL
(same with or without shift !!!! )

- if you cant do things proper learn from adobe ... (if is propper is intuitive, if is intuitive I would not be here)

- shift + scroll = scroll  has no impact

- ctrl + scroll = moves left and right

- alt + scroll = moves up and down

!!!! pls dont write me usefull answers all you DIE HARD USERS !!! I use shift + scroll for fast zoom = not working, ctrl+scroll for slow scroll not working but  (ctrl is pressed and I scroll and the screen moves left and right) !!!!

where, how can I adjust the zoom in and zoom out speed