Sr / MMR questions

Why does a close game loss where i’m on fire and have medals in everything make me lose 25 SR but a close win where i’m on fire and have medals in everything give me 19?

probably bc the matchmaking system expected you to win with ease on the one you had a close win with (due to sr difference between yours and the enemy team)

both games SR was = on both teams

Medals and “on fire” don’t matter. What matters is a statistical comparison to other players of your same hero/map/SR range. But the details are opaque, so I can’t give you a formula. See How Competitive Skill Rating Works (Season 11) → Performance Modifier for more.