countries involved...those inspectors didn't just take Iran's word...they knew what to look for so as to verify compliance. That is not the case now. Note that the very best intelligence sources had the same concerns you have and would not have accepted those IAEA reports if they felt they couldn't be trusted.
Trump made a huge mistake...but then, he's not really an independent thought leader and cares only about his own survival and pleasures. You are a poor judge of character.