Randy Couture -- Ronda Was Wrong ... Shouldn't Have Exploded On Paige

You don't CUSS SOMEONE OUT for congratulating the person that beat you ... so says UFC legend Randy Couture, who says Ronda Rousey was straight up wrong for going ballistic on Paige VanZant.

As we previously reported, Ronda sought out Paige at a VIP event last month -- and ripped her a new one for having the audacity to give Holly Holm props for beating Ronda at UFC 193.

"You shouldn't take that sort of thing personally," Randy told us.

"If you lose, then you congratulate the guy who just beat you, so why would it be an issue?"

So far, Ronda has yet to speak publicly about the incident ... but so far, she hasn't exactly denied it.