SSP vs MSP

I was wondering, why is Storm/Sentinel/Psylocke a counter to Magneto/Storm/Psylocke? Isn’t there like a three way love triangle thing going on where Sentinel beats Storm, Storm bets Magneto and Magneto beats Sentinel, or something of the likes?

theres like 100 teams that “counter” msp. msp is just msp and doesnt care what you think about it, and wins anyway