Dealing with a negative family member…or a person who just likes to put you down

~87.5% of the population only care about themselves and they walk over the meek to get what they want. You can't change them. You need to disassociate yourself from them, before your Soul gets corrupted.
~10% are a mixed bag. Some, will go to the above group, and a few will go to the group below;
~2.5% are the kind that know how to love, and do it.

Marriage and or Family, counts for nothing; you could be one of the 2.5%, and everybody else, in the 97.5%; which is a common thing.

It's the same when it comes to religion.
The Believers are tasked with trying to recognize a 2.5 percenter mixed in among the 10 percent, and throw him a life-raft. That's all we can do.