The AFK's Problem

I've just lost my series, having a free win I thought this is gonna be easy, but in fact, this isn't like this. Two games in a row, having the problem with afk players, this is just too much, one game I understand, but 2 games in a row is just too much, in the first game one dc'ed once, then came back, other one in the same game dc'ed about 4 times and last time didn't came back til the end of the game, and in the second game 2 afk's since about 2nd minute. (What's funnier is that after they came back, we could do a comeback, but then I get into another problem, having a player who threw the game, but not on this topic). The problem is that is too painful to lose because of afk people, and I think I'm not the only one who thinks like this, there must be something to mitigate this ''pain'', losing a promo or an amount of lp because of an unfair game isn't good in my opinion. Losing less LP than usual if you had afk in the game, or something else to make the players who played the game from the beginning to the end not being affected too much would be the solution, because I'm so disappointed regarding this topic. One thing I have to mention, even if looks a bit childish, the afk's aren't even getting a punish, despite the fact that I report them, and the players who really tried to focus on the game and to win it are just left with a frustration and a promo/LP's lost.