Movie director and left-wing populist Michael Moore took to social media to express his displeasure with special counsel Robert Mueller's testimony, and to scold those who expected much from it.

Mueller appeared before two different House committees Wednesday to testify about his two-year investigation that determined the Trump campaign did not collude with Russia to win the 2016 presidential election.

A frail old man, unable to remember things, stumbling, refusing to answer basic questions...I said it in 2017 and Mueller confirmed it today — All you pundits and moderates and lame Dems who told the public to put their faith in the esteemed Robert Mueller — just STFU from now on — Michael Moore (@MMFlint) July 24, 2019

"A frail old man, unable to remember things, stumbling, refusing to answer basic questions...," Moore tweeted. "I said it in 2017 and Mueller confirmed it today — All you pundits and moderates and lame Dems who told the public to put their faith in the esteemed Robert Mueller — just STFU from now on."

The special counsel's testimony appeared to be a dud for Democrats according to MSNBC, as he incessantly asked for committee members to repeat themselves and appeared unfamiliar with many aspects of the report.

He was far from the only person to express frustration with Mueller's testimony, with several taking to Twitter to describe him as "senile."