You can see the top 10 defenses of the previous time the tournament was run in the top post. But that was from 7 months ago so hard to compare since there have been many new heroes and limit breakers.
Your defense looks good to me, though. What troops do you have, and what are the TP of the teams that attacked you?
Defense results is dependent on the randomness of the matchmaking algorithm. You can have the same defense as someone who gets A but with wildly different outcome. That’s why I don’t spend a lot of time thinking and worrying about setting the best defense.
Edit : Just realized that the top 10 of the previous tournament wasn’t tracked
If you read through the previous thread (⚔ [16 May, 2021] - 108th Raid Tournament - 4* Buff Booster, No Nature/ Green), you will see that my defense and Ranvir’s was the same, but I got a B and he ended up with a D 