Chest exercises without retracted scapula
For years I had poor bench form (Wasn't retracting my shoulder blades) Additionally, I didn't really focus on smaller mid back muscles and wasn't doing many exercises aside from lats and upper trap stuff, so little to no mid lower trap, rhomboid, posterior delts) and so with a bad cocktail of anterior leaning shoulders and weak back muscles I ended up with injuries and tightness along my back (levator scapula, serratus posterior superior, etc).
My shoulders are still leaned inward and my head is too far forward and so im following the sticky on shoulder rehab and focusing on pulling exercises to basically correct all of these issues. Its going to take some time because of how long I spent unaware of this issue.
My problem is that I still cant do any benchpress with retracted scapulas without pain in the front and back of my neck on one side, and pain around my levator scapula. It feels like on one side (the side leaning more forward) the scapula wont stay in the right position for bench (which is i assume because there's just too much shoulder lean).
If I do bench-press without retracted scapulas, I have no pain and feel a good workout, though it definitely hits the shoulders a bit more, and I just don't want to continue promoting the anterior shoulder lean issue. The problem is at this point my chest muscles have significantly atrophied, and I think avoiding chest exercises is going to make a whole other imbalance issue if they don't get worked. Is it a bad idea to do light bench and dumbell pressing for the time being without retracting my scapula to maintain some chest strength, assuming I just use light weights? What chest exercises can I do without requiring a retracted scapula? Machines?
edit: for reference im 27yo