I have questions regarding Xp and weekly drop

I just brought Prime in Cs2, and it says to get the weekly care package i have to level up, which is 5000xp, but when I play the casual match, even when I'm have good game it only gives me around 50xp and if i play match on compitative it gives me around 300xp, so do i need to play around 20+ compitative games just to get care package???? And why does it says "reduced" right beside the xp gains