The final seasons of BB and Ozark did not capture my interest as much as the earlier seasons did. I liked Ozark when they were trying to acquire and run the strip club, the lodge, the funeral parlor, the casino, etc. The first three seasons the cartel was a quake in your boots organization . . . involving wrath of the gods type fear. By the final season, there was only a mention and not much active involvement in any of the business entities. Sure, Javi was crazy, but they sort of humanized the cartel, Omar wasn't that menacing, the whole plot line involving the FBI wasn't all that interesting, and Wendy's foundation and political aspirations wasn't exactly gripping television. Basically, they ignored the day to day stuff and focused on the primary characters talking to each other a lot. They expanded the role of the kids . . . and I'm not sure that added much. If the overarching theme was about families doing what they have to do to stick together, it seems like they ended up completely messing up the family dynamic. By the end, I didn't really care about the Byrdes because they became so unlikable. Like many other people, we liked Ruth the best, and she ended up with the fate that Wendy (or others) should have had.
And what was the point of the car crash teaser at the start of S4? It had absolutely nothing to do with anything . . . it ended up a two-minute blip on the radar. TBH, I think I would have preferred if that's how the show ended, and it took out the whole family. All that effort to stay alive and "get out" of that lifestyle . . . all for nothing.
Both BB and Ozark did something else I'm generally not a big fan of. They added in several new characters near the end of the show, several of which impacted how the show ended. Javi, Mel, Camila, Clare, Nathan, Senator Schafer, etc. The biggest scene in the entire show featured Camila . . . who first appeared in Episode 38 of a show with 44 episodes. IMO, it's hard to get behind the most climactic scene in an entire series getting carried out by a part time character that just showed up out of nowhere.
Same situation with Breaking Bad. They added Lydia, Todd, Uncle Jack, Kenny, Frankie, Lester, and other peripheral characters as part of the crew of bad guys in the last season. The point being, for either show, to predict how a show would end, no one really could have guessed it, as none of those characters were involved over the first 75-85% of the show.
Overall, I was entertained by the show, but IMO the last (extended) season could and should have been a lot better. Maybe I'm just being overly critical . . .