Him being always scared was the best thing about him!
If Orochi was sooo strong like Kaido or BM, he'll fall into the trap of overconfidence, which ultimately made every previous enemy lose to SHs because of it!
Orochi made a better team with Kaido cause Kaido was the muscle, Orochi was the brain and the person to be always alert and cautious!
Kaido and BM may have relatively similar strength, but both are careless as fuck, they are penetrable, unlike Kaido/Orochi team which was impenetrable team