LP losses at Rank 1 are insane.

Series accumulate LP based off how wel lyou perform in your series loss. So had you won 1 or 2 games before you lost 3 you would of lost less lp. For example two wins before would be roughly 40 lp while 3 losses would be 60 so 40-60= -20 or 80 lp after series. 1 win would be between 60 and 65 usually and 0 is between 35-45.

Actually going 0-3 and coming out with 39 lp means you lost 61 lp total so only a little over 20 per game. So that is about average for most people.