Gaining fat but not muscle

So I’ve been training for maybe 2 years now (inconsistently) but have really locked in the past 6-8 months. I’m currently on an Upper/Lower split training 4x a week, hitting each exercise for 1 set by 3-5 followed by 3 min rest, then 2 sets of 6-8 (excluding isolated lifts). However, recently, I’d figured that im not gaining any muscle but only fat. My love handles have maybe doubled in size, and my bench has not gone up 1lb. For reference, I’m 6”2, eat 3200+ calories a day, and attempt for roughly 200g protein+.

An issue I see might be causing it is that I usually get most of my macros of the day from one monster meal at the end. For example, I eat 1k throughout the day, then at night 2ish hours before bed I drop 2k calories and like 150g protein. I would really appreciate it if you guys could help me.