I really, really, really hated the prosecutor in the case. I thought there was enough reasonable doubt to let Avery (and Dassey) walk, but the whole system is just so freaked up and corrupt.
Avery showed up to the trial of his life looking like a bum and sounds unhinged every time he opens his mouth (which, during the trial was never). The jury doesn't forget that and there's no way they didn't know about his history of pulling guns on family members, setting cats on fire, and being a degenerate. The prosecutor is a smug jerk, no doubt, and has some issues but he did the job he was elected to do and got a conviction for the person that all of the evidence (something the people behind "Making a Murderer" decided to leave a lot out of for some reason). The lawyer for Dassey, according to "MaM", looked like he wasn't doing his job but let's be honest - Dassey is a stone cold certified idiot that just could not help himself if he did or didn't testify and couldn't keep a story straight. To spend 10 hours on these two cases they left out a lot of trial testimony that wouldn't have helped either Avery or Dassey.
The whole system isn't freaked, in my opinion, and when you consider both Avery and Dassey got jury trials and lost all of their appeals (so take the "ineffective counsel" card off the table) it's hard to see where there was a miscarriage of justice in these two cases. Dassey didn't help himself (he should have taken a plea) and I seriously doubt that even if he was to get a new trial the outcome would be any different. The state of Wisconsin put away a murdering scumbag and a kid that, based on all of the evidence and not just what was presented in "MaM", was involved in a horrific crime. Just too bad they don't have the death penalty.