Puffyy                   

believe it or not,Inouye and Ogata actually did really love each other.their only main issue was how Inouye singled out Sheru for his tongue
Sheru aside,the two actually had a healthy marriage.Inouye would try for Ogata’s sake too at least pretend to care for Sheru as much as he cared for Kazuichi…but then the car accident happened
he became an alcoholic and showed his true colours and hatred towards the twins,Sheru especially since he saw him as to why his beloved wife died
this isn’t an excuse for his actions,but an explanation in a way