Sigourney Weaver has very publicly claimed that the AvP movies did significant damage to the Alien brand, so it’s not too surprising if Ridley Scott’s comments to Yahoo Movies came from the same place.
It’s not necessarily that surprising that Ridley Scott might have thought the creature was “cooked.”
As popular as the xenomorph has always been.
Following his own original film the Alien franchise saw three sequels, only one of which is generally regarded as being any good, followed by a pair of Alien vs. Predator movies that are…well, they’re movies that happened, to be sure.