I guess you would know (I'm not being sarcastic). Being Mark's brother you are/were close to Scott. However, are you saying this because you have heard it first hand? I only know what comes out in the media, be it in print or him personally in an interview. I'm sorry, but I haven't heard anything negative from him.
The whole situation really is sad. Maybe not from your point because Mark is your brother. But from the fans point - it stinks. Scott and Mark wrote amazing songs together and I do feel bad that Creed is done. Even my kids who are 5 and 3 love the music. Just tonight I had to keep replaying BC version of One in the car just so they could sing it.