Play video content EXCLUSIVE TMZ.com

Piers Morgan's not bashing CNN for going after huge ratings with stories about President Trump and Russia, but thinks their Prez-bashing is dangerous journalism ... and led to embarrassment.

Piers, Editor-at-Large of Dailymail.com, tells TMZ he's not surprised CNN is now in trouble over an undercover vid coming out suggesting its Trump/Russia coverage is BS ... because they've been pushing the narrative too hard for too long.