At this age I did an iPad detox with my son. That instant gratification, and what they are watching changes them! What I did to keep him happy was create structure around his day. Before preschool, we do breakfast and a easy creative task, like coloring. When we get home we have lunch, go over his school work and watch music videos on the tv. Dance and have fun. I give a choice to him to clean up with me or play by himself after. He usually plays. lol Then we do a physical activity at home. 3 days a week he does martial arts. Dinner, bath, sleep repeat. I let my son know what to expect. I like to know what’s going on. He’s the same way. Wipeable activity books, coloring, anything educational in fun ways has been helpful! The tantrums will go away after the technology addiction is gone. For the bad words, make it clear that those are mommy daddy words. Not for kids.