How does that make sense? You lost elo. If I was looking to get 1500 and I lost elo because of moron deciding to troll which caused me to lose 12 elo, well, that's 12 elo I am away from my goal
This is introduction of this dumbass rule is the exact same thing. If you dodge, you lose LP. Since your goal is 100 LP, now you're farther away from your goal (just like you were further away from 1500, your elo goal).
And even aside from that fact, it's the idea behind it that is causing real players to be punished rather than the toxic players who should be punished.
This is just like DRM that punishes legit buyers with a limit on installs. They're both stupid 'fixes' that make in no way fix the initial problem.