I likewise promoted and hired to try to make the situation tenable, but wasn't allowed to change my role to be less client/organisation focussed - by that point I was truly shut out of the dev team.
It's also very hard not to take personally when nobody else is willing to take any responsibility - everything ends up escalated, usually with clients making death threats and other such fun.
Perhaps I'm just thin skinned, but I reached the point where halving my net worth just to escape was the best option.