No, the Raiders left LA for the same reason they currently have beef with Oakland. They wanted a 100% publicly funded stadium. In 94 Oakland gave them a couple hundred million to "upgrade" the Coliseum and LA wouldn't give them anything, so they bounced.
and the Rams left because St. Louis gave them the Edward Jones Dome which was brand new in 95 and they didn't want to play at the Angels baseball field anymore.