Earlier quoted context omitted.
Not disagreeing with you, but OP specifically mentions being burned out, and I think for this specific situation it may be better to cut losses and go elsewhere. If you have the energy and enthusiasm for fixing broken things, this is great advice, ideally before the point of burnout / before six months (but after at least a month or so). But not every senior role has to involve cleaning up messes and picking politica…
Burning out is likely due to a lack of focus on concrete, actionable, blessed endeavors. Fixing everything at once is impossible.
Folks do get burnout because of personal habits, but just as often it is due to the environment that they work in.