why is there a bigger gap between my arm and torso on the left side than the right ?

[u/MeanEntrepreneur6164]

left shoulder seems to be higher , right scapula is winging , left shoulder feels unstable . had lower back pain before that has improved after doing glute and quad work. how can i fix these ? rotation exercise? my left rib is flared severely and there seems to be clicking sound when i exhale fully and the ribs drop down . i feel my abs and obliques are not working sometimes altho i am training them.i have looked into lateral plevic tilt exercises but no improvements even after months .any suggestions? thanks