Why there are so big difference between amount of points when you win and lose?

Question

It's very annoying when you challenge random player for 2xp (or 0 when it's draw no matter if both of you answered 5 of 5) and if you lose you get -30xp (minus thirty!!!). Should it be -2xp, no?)

Answer 1

I feel this. loose one challenge 4-5. loose 30xp. then I draw on 3829 challenges. thats 0 xp. win a few. now im at a net of -10 xp. its kinda ridiculous.
and why only 5 questions!!! gimmie 20. and I dont wanna know how much they got right. I want it to be a surprise.