There is absolutely 0 reason why dodging causes a loss in Promos. Why not just normal - LP?
There is zero consistency.
If you win promos you get 0 lp, even though winning 3 games (or 2) would actually put you above that LP in the next division.
Dodging should deduct 3 even in a series, so whatever LP you would be at after series, you just are -3 from that.
Trolls should not be granted absolute power over you just because you are in a series.