The biggest complaints regarding blitz stem from other players not knowing what to do. This is pronounced in rat league bracket and can keep you in a loop and bouncing 100-200 CR at a time plus or minus.
Can’t win them all, but remember as a dps you’re only 1 of 5/6 other dps. You can make a huge impact with your class and being at the right place. Small incremental assists over time will increase your mmr over time. It’s a slot machine and you’re the house.
If you’re 400 games played at 1700 - that’s where you belong. Just keep improving and keep queuing - youre not owed anything.
I also find it interesting that the tops of the ladder are dominated by ex-rbg players and not only glad arena players. This shows that even queuing solo, good positioning and map awareness is a factor higher than raw technical skill at the game, which arena is a better metric for.
Lastly, the fastest way to climb out of the rat league bracket is to queue with a healer (I didn’t have that luxury). But once you’re above 2.0-2.3 it’s not as impactful. This is assuming you’re at the skill level that’s above average.