C'mon Gaby, you already know the answer to this, and I don't know why you thought you'd hear any different from me.
YOU CANNOT EDIT UNDER THESE CONDITIONS.
No, this is really really bad. You NEVER change your monitor profile. And you definitely don't calibrate to Rec-709, any more than you calibrate to sRGB or Adobe RGB for photography. Rec-709 is a working space, not a monitor profile. No wonder you're having problems.
If photos in Photoshop look fine compared to their prints, then we can rule out a calibration problem, and start to look elsewhere for the issue.
Please confirm this.
You're missing the point. You need to make sure your calibration has worked properly, and not screwed up your screen.
FOR THE LOVE OF GOD WOULD YOU CHECK YOUR CALIBRATION AGAINST PRINTS?
Then you didn't follow my tutorial, did you? It's right there at the beginning in a big unmissable red box.
It doesn't matter if you're not a photographer. You still need prints to confirm calibration.
Well, if the screen isn't calibrated, it kinda doesn't matter which viewer they use
If you can get them to calibrate the screen, then use Bridge to view, they'll be sweet.