If you say so. I can tell you I’ve been tracking my times pretty judiciously in the past year. For each of those Borderlands games, my times were:

Borderlands 1: 23h17m Borderlands 2: 35h15m Borderlands: The Pre-Sequel: 22h21m Borderlands 3: 35h25m Borderlands 4: 28h26m

So I guess Borderlands 2 wasn’t longer, like I may have remembered it. In each case for the above, I basically just did enough side missions to keep pace with the recommended level of the next main story mission, which amounted to a few hours per game. All of those times include the DLC, and the DLC is also very similarly sized and paced across games.