Need a defense attorneys opinion!!!!...?

when I was convicted 4 yrs ago I was originally charged with 3 charges..1- endangering the welfare of an incompetant(for having a naked picture of my ex girlfriend on my phone, she was 1 1/2yrs younger than me and we dated for 2yrs, her parents even tried to get us to marry each other)..2-breaking and entering(to my own house) and contributing to the dilenquency of a minor-alcohol (i was 18 at the time)...3-criminal mischeif 1st degree(for throwing 1 beer bottle at a church sign outside of a party, I was 1 of about 10 ppl throwing stuff at the sign and I only threw one bottle)...when I was arrested I was denied the right to have an attorney present or make my phone call, the police threatened me and told me to say what they wanted me to say or they said I would have to sit in jail for 3 days until my hearing and they would not take it easy on me at all, so obviously as a scared 18 yr old I did what they told me and was in and out of court every month for 15 months bc they kept postponing it everytime I went...then after 15 months my public defender told me to just go ahead and plead guilty to all 3 charges and 2 of them would get dropped and I would only take the lesser of the 3 and get MAX 2 yrs probation and that's it, so I did and the judge gave me 5 yrs probation and a felony!!! Keep in mind this was my first offense EVER and it has ruined my whole life, now I'm getting a lawyer to sue them because I am being told that this is ridiculous and an outrage that they could not have even charged me with 2 of the charges at all and criminal mischeif is a joke for throwing 1 bottle a a sign...so I'm curious as to what another attorney might think about all this?..please be honest!