Seems likely you've got a defective (crimped, bent, or obstructed with eg. a bit of a rag) fuel filler neck. The mechanism in the pump depends on a free flowin

Seems likely you've got a defective (crimped, bent, or obstructed with eg. a bit of a rag) fuel filler neck. The mechanism in the pump depends on a free flowing, successfully venting filler neck. If a bit of detritus got into yours and is reducing the flow, it will do exactly that. Seems more likely than that every pump handle you visit is defective...either that or the small gas tank/bladder on your Prius can't accept a high enough flow rate to work with normal pumps, though I'd be surprised if Toyota missed that. Dropping the tank and replacing it or the filler neck is a pretty easy DIY project.