You can blame Norwood or Harmon for that loss, but consider these other factors:
footing was bad all day, Cleveland kicker missed a makeable FG in the first half because he slipped
on the PAT, looks to me like the snap was high
Harmon made some key catches down the stretch before the drop
Bills wouldn't have been in that position if the DBs hadn't been practicing Social Distancing from Webster Slaughter all afternoon. He caught 2 TDs with nobody near him
Ditto if the special teams hadn't surrendered Cleveland's first-ever postseason kickoff return TD
Lots of things contributed to that loss. Norwood was still a Buffalo hero and nothing can take away the Harmon hail mary catch against the Patriots.