I don't really need my characters to be likeable or good, they just need to be interesting and make for compelling viewing. I can root for a bad guy and I pretty much always sympathised with him, does that make me a bad person? Probably. I thought Breaking Bad ended quite well personally, though I didn't love what they did to Jesse's character, but it worked.
Ozark is altogether more shallow, the characters just play their part in fleshing out the plot. It's good entertainment. Marty and Ruth do their bit though.