I’m sorry to hear about this. For now, try to calm down, it’s great that you found someone to tell it to and thank you for trusting me for that. Be there for your mom and comfort her. As for your dad, look for a time to tell him what you told me, when he’s alright to talk. Soon is great but it doesn’t have to be right away. Opinions about anything are not bad but being ungrateful with what your mom could give to him (for the time being I presume? I’m sure she doesn’t give him left overs all the time) is a different thing. I guess explain to him as well why he’s given leftovers;; you say your dad is normally awesome so I’m sure he’ll listen. But if he still doesn’t, maybe something’s bothering him? You can also try and get that out of him too. 

I’m not sure about your full FULL story (bc you’re on anon lol) but yeah, if I was in your shoes, I’d just open up and be there for them. You guys will be alright. Take care!