You are right ... most docs don't do "real" mastopexies anymore. Grr!
Suing might be difficult. I do not agree with the fact that many surgeons make you sign off (in the immense amounts of paperwork prior to surgery) that if there is an issue, they cannot be held liable. There needs to be some legislation created about this.
On a happier note, 4 weeks is still very early in the scar healing process. They WILL improve. To what degree I am unsure. Can you post pics?
I think you should speak to a mental health professional regarding your depressive symptoms and suicidal ideation. Suicide is never the answer. I am speaking as a professional. Recourse will be avaiable in some form (healing, acceptance, revision, etc.).
I hope I have helped you a bit!