I've been in the gym for 4 months and feel like I haven't made progress

I'm 22. 5'8, 160lbs. I'm aiming for lean physique/body recomp and getting rid of my stomach fat, and I have been in the gym since January.

This is my routine. 3 days a week.

A day:

3 x lateral raises

3 × kettlebell swing

3 × planks

3× lunges

3× bicep curls 

B day:

3× pushups

3× squats

3× bicycle crunches

3× roman deadlift

3× chest press

3×shoulder press

Sometime in late March. I wasn't in the gym for about 3 weeks cause of switching gyms for convenience reasons. When I came back, I started taking it slow and then tweaked my routine and increased my weights, but I realized recently that, so far, that my routine isn't that great, and my diet sucks and I only eat to survive. I would post pictures of my physique, but I'm not super comfortable. Basically, I'm skinny but have low muscle mass. I think I'm getting stronger, but I'm focusing a lot on my physique. I don't want to end up 6-12 months in with nothing to show for it.