I play on the easiest mode and that damn whole stealth chain of missions was awful. Hated every moment of it. Forget if you never put points into stealth, then it'd truly be impossible.
Like when you mind control, why do the other NPCs and turrets think they're enemies and start blasting their own homie who's just trying to run to a corner? Also sometimes the social popped up but I couldn't mind control, even as hidden.
Had to blast some NPCs multiple times during those quests just to get out of the chain cuz it was basically impossible do it undetected.
I didn't mind the stealth missions. Had only 1 point in stealth and some chameleon armor for the ones during the crimsonfleet quest line. Did the ryujin ones with 3 levels in stealth and my armor.
Gotta make sure you're using the stims that reduce noise, as well as turning off the run button while you're crouched. Sense Star stuff power helps in seeing where guards are and patrol routes. As for robots and turrets, just can't be in their line of sight, so move when the laser is pointed away. Can also disable them momentarily as you make your way past.