Having now seen the entire season, I'll share what I wrote on Letterboxd:
"The couple of episodes featuring Sam, Bucky, and Zemo off on an international adventure together really worked for me. Pretty much everything else... didn’t. The Flagsmashers never became credible or compelling villains with clear-enough motivations (as presented, Karli, the leader, is kind of an incomprehensible character), and the structure and pacing of the episodes were frequently questionable. Rumors and speculation indicate the show might have been heavily reworked/restructured due to the pandemic, and while we won’t know for sure if that’s true unless the talent speak about it, there is definitely evidence within the show itself that it’s not fully what was originally intended. There’s really no other explanation for how limp the Flagsmashers stuff ended up, and since that was the driving plotline, the entire series was undercut by it. The show did set up some intriguing possibilities for the future."
Ultimately, I think it was 1/3 a great show, 1/3 a solid show, and 1/3 a pretty bad show. Zemo and Walker ended up being my favorite elements. I look forward to their further usage in the MCU going forward.