He did plenty. In the movie he lit the beacon to call Rohan. Fought in the battle for Minas Tirith, where he saved Gandalf's life. Saved Faramir's life. Saved Merry's life.

Sauron himself questioned Pippin and came away with the conclusion that he should apply his army and attention toward Minas Tirith and Gondor rather than continuing to look for the real ring-bearer right under his nose. Essentially made the entire gambit with Frodo possible.

This has been a pro-Pippin PSA

[–] HK65@sopuli.xyz 4 points 1 week ago

He was technically responsible for the deaths of two of the most powerful beings in his universe. Pippin is the OG Kratos.