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.