Rome had a run of Five Good Emperors that's widely considered to be its imperial golden age and it was ended by the handover of power from Marcus Aurelius to his son Commodus, who took an empire doing well and drove it off a cliff.
People compare Trump to Nero or Caligula, but he's Commodus
usually if you ask experts why an empire fell they’ll say it’s nuanced and multifaceted, so i think it’s kind of cool that with America future historians will get to just say like “oh they took the idiot train to moronsville”