I have unfortunately had to stop playing ARAM, even though I used to it a lot and probably played more than 200 games of it. The problem is that in about 1/3 of my games, my team gets completely outclassed by the enemy team. In these games I always have a feeling I'm playing against a 4-stack or a 3-stack and sure enough, 90% of the time at the end of the game I see the enemy team has multiple players ranked as ancient or above, while everyone on my team is herald or guardian. These games are not fun at all - from minute 1 until the end of the game, if I even go within spell range of the enemy team I get blown up instantly, while my team usually has multiple players who have no clue how to even play ARAM (or Dota in general).

These stacks have an unfair advantage for multiple reasons:
1. They are all experienced ARAM players who know which heroes work and which heroes don't.
2. They are always ranked Ancient or above in real Dota and it's not uncommon for them to be ranked Immortal, whereas the average player on the opposite team will usually be ranked between Herald and Archon.
3. Since they are friends and know each other well, they have a communication advantage.

ARAM is not really enjoyable when in a third of my games I have to sit through a one-sided stomp knowing I have no chance to win, and I can't even enjoy it. And if I abandon I get punished, meaning my next 2 games will be even worse. Sadly for that reason I have had to stop playing.

I hope there is some solution to this issue, either by banning pre-made stacks from joining a game, or giving them some sort of in-game penalty such as reduced gold to make it a bit more fair.