Now that Jeff Fisher has been fired, Eric Dickerson wants to give Rams fans a bit of advice -- don't feel bad for the guy, 'cuz he's still filthy rich!!

Dickerson talked about the firing on The Eric Dickerson Show on AM 570 L.A. Sports ... and it's clear he's not surprised about the change.

E.D. -- who vowed not to attend Rams games as long as Fisher was coach -- says he hates to see a man lose his job, but doesn't think he deserves any sympathy.

"You can't feel sorry for a guy who's making $40 million."