Struggling far too much with dumbbells. I can easily incline 155 for reps, but damn can't even move 120, just feels so unstable with dumbbells.
Benching with dumbbells is definitely harder and it's quite common to struggle with ~75 - 80% of your regular barbell bench.
I'd recommend trying to get your warm-up sets up yourself to practice it a little and maybe find someone to help you get one of the dumbbells up in position for your working sets.
Oddly enough I've never really been worried about dropping them on my face, you can always lower them down on your chest in a controlled manner if things seem off.