This is the stupid golden ratio DJ is always carrying on about. You guys claim I have no taper which is nonsense. If measured Shoulder to Hip I am 56/35 or 1.6. However, if measured shoulder to waist I am 56/32 this am which would be 1.75
So go ahead Getbig let's get some some Shoulder to waist ratios don't be intimidated by mine.
The Adonis ratio is shoulder width to waist. It does not measure back taper.
You have high lat attachments. Your lats are also lack thickness so you look flat.
From the front you have no lats.
Unfortunately having high lats is probably not something you can correct.
However, you could do lots of barbell rows to thicken you back and see if it helps.
Also practice the front lat spread. Perhaps with a lot of practice you can train your lats to flare out.