The series had a mix of good and bad, but the use of bucky was really good interesting from WW2 bucky, a zombie survivalist, a fugitive that goes on a road trip, an older politician one, a fun and adventurous Robin hood one and member of a mecha avengers. They were all used really well and Sebastian Stan did a really good job voice acting wise in all these appearances throughout the show.
I love how much Bucky aka Winter soldier that we got throughout the what if series, and they were a variety of versions that were similar but in vastly different times in his well known and long complicated life.