Alabasta Crocodile yeah, I think he was definitely too weak. His bounty also seems to reflect that when most fodders from part 1 already brandish a bounty of 100,000,000... that seems to be nothing for the later part of the series. That's a problem with power scaling, I think Oda didn't plan for things to extend as much, so when you look back, even a foe as well regarded like Crocodile seems little more than fodder when you do the match going from the Luffy that defeated him back in Alabasta.
Iirc Oda also stated that he regretted a little of having Croc being done-in as early, and as you'll see from later part of the series, Crocodile will feel way more empowered... lilkely matching Oda's later feelings of where he should stand.