@Henry Hudson GC he lost to a teenager :/
Not trying to out-debate you here, but let me make a couple solid points:
Zhao was beaten by Zuko, who at the time was a 16 y/o boy.
Iroh could easily beat Zhao, I think that’s already established.
Azula could beat Zhao too, she is an EXTREMELY formidable opponent, and Zuko lost to her many times.