[de > en] I'd like to know what a few of these words mean in this comic

I get the joke this time. It’s that the child is asking for more allowance and the parent is asking them to try harder in school.

The kid promises and the parent says something like, “ok I’ll give you 25¢ a day instead of 2€ a week!” Right?

I was wondering if someone could clarify a few things though.

Is “krieg” here “kriegen?” I see in the Cambridge dictionary that it’s a colloquial form of “give.” It’s kinda neat that you’d say “gimme” instead of “can I have”.

How “bad,” is “Niete?” It says in the dictionary that it means someone/something that is a loser or a complete failure, but that sounds a bit harsh coming from a parent. Is it a little light-hearted like “dummy,” harher like “dumbass,” or even worse?

Thanks!

I’d also like to remind anyone reading this that if you need help with Japanese, I’m always here to help!

Edit to add: Thanks so much for the explanation! I won’t be calling anyone Niete to be safe.