Dragonlady
Designing Woman
Trump had no clue what the TPP or Paris Accord or Iran Agreement were about. He just killed them because he was jealous and obsessed with revenge against Obama because Trump was the leader of the ignorant birthers.
You're absolutely right. When Trump realized what he'd done, he tried to get back in and was rebuffed because the participants, had moved into the "legislative phase" of the Agreement, putting the legislative infrastructure into place to implement the treaty.
They basically told him "Not while you're President".