I recently completed 3 rounds of onsite:

Round 1: Coding - Went well. Solved both problems.
Round 2: Behavioral: Went well.
Round 3: Coding - I wasn't able to solve both :(

Round 4: I have System Design scheduled for next week. I'm really disappointed about my coding round and not sure if I should even attempt this.

Anyone has any inputs if one coding round did not go well, it is definitely a no hire ?