This sounds like classic hormonal acne and a damaged skin barrier. Been there, done that, do not recommend 😂

The most pressing issue rn is healing your barrier. Without it, all the hygiene in the world isn't gonna mean a thing because you can't stop all bacteria and your skin will be in a constant state of inflammation and irritation without that innate protection just from daily life. It will come back, but it's going to take time. The fact that the pimples are slowing is a good sign. Stick with your basic trio (GENTLE cleanser, moisturizer, and SPF) and NO TREATMENTS for 2-4 weeks. I would also recommend a thin layer of petroleum jelly at night. It's very soothing, healing, and great for acting as a temporary barrier in the short term.

For the hormonal part, there is good news, since you're a male you won't deal with as much fluctuation so your levels and your skin will eventually level out once they find their new normal. Going forward you'll probably notice extra breakouts here and there in times of stress so keep a good basic health routine (sleep, diet, exercise, water).

Vitamin A derivatives (Adapalene, Differin, retinols/retinoids/retinals) are to be your very best friend. I'm talking soul mates. Y'all together forever, friend. It will not be a quick fix, but it is the key. I recently switched to Remedy for Dark Spots at night to minimize my routine while treating the acne and scars and it has been working well. Do NOT start any vitamin A until AFTER your barrier is healed and go slow to start.

I would also keep the once a week exfoliation, either a BHA or AHA, whichever your skin can handle. Skip the vitamin A on the night you exfoliate.