Almost all people I knew that were playing Harthstone have quit. From what I see, this forum has been almost deserted for months. This last shitty expansion was another nail in the coffin of this game (after Brode left, the devs have gone crazy with some of the most insulting nerfs ever).
I decided I am no longer supporting the game with my money, so I rely completely on the bot. Sadly, the winrate is so low I ended last month at rank 19!
What do you think? Is this bot going to die? What about the game itself?

I'm not sure where you're from, but where I live there's a flourishing community with lots of active and competitive players. Also calling the last expansion and nerfs shitty and insulting is rather subjective, as I myself and other with me would disagree with you on that. It's true that new competitors are on the rise, such as Artifact, Bazaar, Gwent, Shadowverse, and MTG online. Hearthstone might lose its monopoly (if it hasn't done so already), but the game is far from dying.
This bot on the other hand, the few great config writers have departed about a year ago and it's up to the community to pick up where they left. You yourself could make a difference by learning to write configs, test and refine them, and share with the community.