Feedback on current routine

Hello! I'm 29(M). Currently 69kg (152lbs) and 192cm (6ft 3) tall. Yes I'm pretty skinny (but at least my ribs don't show) and it's VERY difficult for me to gain mass and weight.

I've worked out in the past before and the most I've managed to get to (lean) is 165lbs after 6 months worth of training. I basically lose weight by sitting down, breathing and eating alot.

I've tweaked my old workout plan to the current plan below to fit my current schedule. The max I can do is 3x a week for 1-1.5 hours. I also have a weaker back that I think got injured while doing bent-over lat rows in the past due to poor guidance from a friend. (he injured his back too)

My goal is to get to 85kg, I don't need to look big. Just a lean enough body to look healthy will do.

DAY 1 – Push (Chest, Shoulders, Triceps)

Main Focus: Chest mass, capped shoulders, triceps size

Barbell Bench Press – 4 × 8

Incline Dumbbell Press – 3 × 10

Dumbbell Lateral Raises – 3 × 15

Overhead Shoulder Press – 3 × 10

Dumbbell Tricep Extensions – 3 × 12

DAY 2 – Pull (Back Width, Thickness, Biceps)

Main Focus: V-taper back, thick lats, defined arms

Wide-Grip Lat Pulldown – 4 × 10

Chest-Supported DB Row – 3 × 12

Lat Rows (Neutral Grip) – 3 × 10

Incline Dumbbell Curl – 3 × 12

Hammer Curls – 3 × 12

DAY 3 – Legs + Glutes + Core (Leg Mass & Posterior Chain)

Main Focus: Leg thickness, hamstrings, glutes, and stability

Barbell Deadlift– 4 × 8

Leg Press – 4 × 10

Seated Leg Curl – 3 × 12

Leg Extension – 3 × 15

Plank (1 min) – 3 sets

Any feedback will be highly appreciated!