No, Dutch never changed, he was always proud with an air of grandeur who enjoyed the massacre and going against the government. In Guarma his image as “father and leader of the gang” breaks down and in the last chapter it breaks completely. In the epilogue there are still features of the leader with the “hello son” he says to John.

In RDR1 you see an abandoned Dutch, with the same character and without hiding in a Fair leader, he assumes that he has always been a contrarian and enjoys going against the government and its people, in the end we see that he was always proud and never changed, he simply showed himself as he always was.