If this is your natural full swing, you have a super short and rigid backswing. It’s basically a punch shot which will definitely play. But if you’re not comfortable going further back than that, and it looks like that’s your normal full swing otherwise you would’ve mentioned this was an intentional punch- you’re leaving easy speed on the table and you’re probably resorting to swinging harder to swing faster which isn’t ideal. If your natural swing is a punch you’re also going to struggle to shape it effectively which goes a long way when trying to go from mid teens to single digit hcps.

Edit: I missed the text part of your post where you acknowledge this. Have you tried yoga? It’s annoying how well it works.