connecting rod bottom bearing

i got a brand new prox connecting rod when i put the 440kit in it now since the motor blew i got it back from the macanic all in peices cause i was so mad at them i took it from them and said ill do it my self.
they said the bearing on the bottom on the crank from the connecting rod was shot i got lookin at it your right it was shot almost seems like theres no bearing there u can move it up and down side to side i em just wondering is there anyway that it wasnt my fault would of been a bad bearing bad instalation of the bearing by a chance cause the motor had lots of oil ????:confused: