Stuck at 80kg bench for 6 months. What am I missing?

Been training 5 to 6 days a week for two years. Squat and deadlift keep moving. Bench has been stuck at 80 for 3 reps since March. Things I've tried: paused reps, close grip, more volume, less volume, a deload week. Sleep is 7 hours, protein is around 150g a day at 78kg bodyweight. Someone at my gym said my elbows flare too early and I'm basically doing a wide grip triceps press. Another guy said I need to eat more. My coach left the gym so I have no one to check form properly. Would appreciate any Chennai lifters who've broken through this plateau.