My (personal) gut reaction would be that that CEO can fuck off. That said, my advice would be to weigh whether or not the portfolio boost is worth dealing with

My (personal) gut reaction would be that that CEO can fuck off. That said, my advice would be to weigh whether or not the portfolio boost is worth dealing with any toxicity you may or may not experience. I suppose it's possible (not trying to assume, just that I don't know) that s/he doesn't know how toxic you felt the place was.