The Pittsburgh Steelers were blown out yet again in the postseason, marking their fifth consecutive playoff defeat going back to 2016. They have the second-longest active postseason losing streak now behind only the Miami Dolphins, who just lost their sixth in a row. But it is the 15th streak of five games or more in the Super Bowl era, by the 14th different team, via Stathead through Pro Football Reference.
The first extended losing streak of five or more games was by the Cleveland Browns, who lost six games in a row from 1969-85—clearly not making the playoffs terribly frequently.