You’re right if you mean never won playing major college schedule (D-1A ) ,but there was a time RU FB made it’s fans proud by winning them all ( playing a D-1AA schedule)
The 1961 Rutgers Scarlet Knights football team: In their second season under head coach John F. Bateman, the Scarlet Knights compiled a perfect 9–0 record, won the Middle Three Conference championship, outscored their opponents 246 to 102, and were ranked No. 15 in the final AP Poll
The 1976 Rutgers Scarlet Knights football team: In their fourth season under head coach Frank R. Burns, the Scarlet Knights compiled a perfect 11–0 record while competing as an independent, outscored their opponents 287 to 81, and were ranked No. 17 in the final AP Poll.