Anyone of you got sole custody with maintenance of child n wife?? What is the circumstances?

my husb is a civil servant. he is a gambler. always plays mahjong. lately go drinking and come back and vomit in the toilet. i saw his fb msg that he is asking his fren got any girl to tabao. he doesnt want to look after my lo. reason bcozz he say he dont understand wat he is talking. how u expect 15 month to talk and understand. hot tempered who failed to listen. always want me to listen and go with his decision. when i try to talk things out in a calm way. he jump into conclusion. therefore he will hit me. he also point knife at my dau to chase me away. wth seriously. he is hving affair now. from your opinion do u think i can get Sole with maintenance??