Take off the blue tinted specs and look at this from an unbiased perspective. To say that he's 'wank' and does nothing but foul is entirely wrong.
Neither MacTominay nor Phillips are elite players, but at least MacTominay has proved to be a good player at PL level. Phillips has yet to prove that.
While that may be down to unfortunate injuries etc, I think we've seen enough to suggest that he's barely treading water at City, and doesn't look capable of making the step up to top level.
He's a good player at the wrong club. MacTominay is a good player at the right club.
Both will move on to more suitable clubs at some point. I can't see Phillips getting another year at City.