Will my MMR be affected negatively if i drop in preseason?

Because I am now from Gold 1 to Gold 3 0 LP cause i had 6 out of 30 games an AFK player in my team or just get the worse team.. i lost only around 30-40% of my losses due to me sucking.. and thats not even 20% of my games cause I am at a horrible 40% winrate now.. I am losing games where i carry like shit because some random AFK or just the worse team.. It's just so demotivating after 30 games to still have this happening.. i had 4 AFK games after 20 games and thought it was just a unlucky streak that will be over by then