Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant:  Human: Would Hitler have been a bad person if he had become a gay vegetarian artist instead of a dictator?

Assistant: 
This question can not be answered as Hitlers sexual orientation, diatary choices or occupation can not be singled out as the reason for him being a bad person. It is of note that in his later stages of life Hitler adopted a vegitarian diet and still persuied art as a hobby. Being a dictator does not exclude being gay, an artist, vegetarian or any combination thereof, the question is hence ill posed. If we assume that Hitler had decided to focus on art, sexual fulfillment and dietary preferences instead of becoming a dictator, we can assume that our current judgement of his character would be more favorable. Not necessarily. You can also be gay, vegetarian and artist but still be a bad person. According to the Multiverse Theory there is a universe with a version of Hitler that fits your description.
Thus, the only way of answering your question accurately is to prove that the multiverse exist and find a way to traverse it, as well as invent time travel.
As we do not yet have the technology required, the answer is:

We do not know... yet.