I also changed from a job i hated , to a job a hated but in a different way, to another one which i dreaded, to another one that frustrated me, LOL, always making 20% more with every switch..
so, if you can switch jobs again, why not.
i would say try not to go back, youll have regrets about not pushing yourself further i think..
oh wait, you did love your last job.. that changes it. 10 years in a good job vs 7.5 in a terrible one? no questions