The Grass Is Not Always Greener
At one time, Elaine essentially walks away from Jerry, George, and Kramer in the backward Bizzaro Jerry episode. Somehow finding an almost identical friend group, she abandons her friends to be with the new, better group. However, the grass is definitely not always greener and Elaine soon realized she doesn’t really fit in well with the Bizzaro group.
While it’s clear Elaine can make new friends, the new group doesn’t accept her as well as the original three. Elaine is famously physical when she gets excited about something and often literally pushes her friends to the ground in her exuberance. Most find the quirky habit endearing, but her new group of friends didn’t. She returns the non-bizarro friend group of friends where she clearly fits in better.