Switch OFF the catalyst. It's not needed nor wanted. Set your monitor to default by going into the menu and hunt around for the reset and select it (you will probably need to confirm the ok)
Did that.
Once done continue with the calibration. What Gamma did you use?
2.2
I have to say I have 2 monitors and my more expensive samsung calibrates very well but my cheaper one is always too bright. I try to turn it down in the NVidea settings but that just changes the profile used so cannot be used. You need therefore to forget about using the controls.
No matter what I do with my second monitor there isn't enough contrast and it's just too bright

Maybe someone with more experience may be able to do somethying but even starting with the brightness down doesn't seem to help......
I feel your pain!