Competitive Skill Rating is questionable...

What I do not understand is, If I go positive 15 in a game and lose, why do I go down 84 points, and if my brother on a separate account gets an 18pt perfection and wins and only goes up 14 points. I kinda feel as though the system is broken.

Is there any information as to why it is so jacked up? I shouldn’t really complain because I also level up more quickly than him as well…idk.

GG,
Jaxon.