Hi,
As Ralph has already said, "take" here means "accept".
"I'll accept dad being angry over the alternative..."
"Over the alternative" means "rather than the other thing"
I've never read "Diary of a Wimpy Kid" (this is that book, isn't it?) so I don't know the context. It could be many things...
"I'll much prefer dad to be angry than.......
- dad being injured
- dad being depressed
- dad being at work
- mum being angry
- big brother being angry
- sister being angry
There are many things that the alternative could be in this situation!
I hope that helps,
Marcus