"where I was protected under Florida's laws"
What law? I don't believe many or any states have post-adoption protections in place. Nearly every state requires pre-adoption qualification of some kind, but the state's interest normally terminates at the adoption itself.
"but when the new step-mother took over, she did not notify the adoption agency, or the governing powers of Florida."
No state I know of would require this. Kids get step-parents every single day and the government doesn't get involved. Shouldn't be different for an adoption, unless you have some specific statute that gave you protection. Your general 'civil rights' would not.
"since I was still a minor when my mom died ... I would think that since the adoption agency is governed by the laws of Florida"
Not in any state I know of.
"My constitutional rights were violated, from the time I was 11 until I was 17 by my step-mother. "
Likely, not. General rights, maybe, if you were abused in some manner.
"Since Florida did not intervene on the change of parents (first adoptive mother to step-mother), I would think they have part liability here too."
Again, no state I know of has any obligation here. Moreover, the government is immune from lawsuit unless it has waived its immunity.
"Because of the damage done ... either my step-mother is liable ... or the state of Florida."
Step-mother, maybe. And if you are must past 23 or so, a statute of limitations has likely run.
Consult an attorney in FL. To the best of my knowledge, none follow the boards.