Hard to judge when you win on Beaux vs a bad opponent.
If you can get away with building 7 grens and 3 flak panzer he deserved the defeat.
What he must have done was go for a fast sniper. Then you wouldn't have had a counter as you didn't build T1.
Opponent is L7 1v1. He's not great but he is not terrible. His tech path was BARS, NADES, HEALS, SNIPERS. Meanwhile I was building grens until i heard the first sniper shot, then i immediately canceled my inf vet and teched to T4 for the flakpanzers.
Looking for advice from you vets. I'm currently plateaued hard around lvl 6 1v1.