My old boss used to gaslight like a mo-fo. But fortunately I kept documentation of everything and I always followed up in writing, so I had proof that they told or didn't tell me to do something and she couldn't make up lies. It was hard when you had to catch your boss in either a lie or them trying to backtrack and have to point out to them that they can't blame it on you, you were doing as directed. I think that's part of the reason I was "laid off" because I wouldn't take blame for things that weren't my fault.