It's time to decide on your next New Year's resolution, and I'm suggesting that in 2019 dealing better with difficult people, even somebody you hate, is well worthy of consideration.
Get some ideas about this from the Medium article:
Why You Should Be Kind to People You Hate
This is available at the Bookboon website as a short article
Seven tools for expertly dealing with difficult people
That's not asking too much of you, I sincerely hope.
Note that I' have no claim whatsoever for being good at doing any of the above!