A message I take from this is doing the knowing you are doing wrong though you know what the right thing to do is. You are willing to change but people don't believe you because of all the wrong you have caused/done. 

Do I trust Inan? Does he deserve a second chance? 

Trust isn't something that you have it's something that you gain over time and growth. Personally, I think Inan has shown some good but trusting him will be a process.

Do people in real life deserve second chances? 

I believe everyone deserves a second chance, but depending on the situation you may think they don't deserve one. A second chance is not given to make things right they are given to prove that you can do better after failing.