Your passage is mostly clear, but there are a few grammatical errors and areas where repetition can be reduced for better readability. Here’s a revised version:
In conclusion, the Ceratosaurus was a fierce dinosaur that managed to hunt down almost all its prey in its habitat due to its advantages. Despite having many enemies during its time, it remained ruthless in its pursuit of survival. The Ceratosaurus effectively utilized its habitat to become even more dangerous. Although it ultimately went extinct due to catastrophic events, I believe the Ceratosaurus was a highly skilled hunter.
Changes made:
- Changed "who had managed" to "that managed" for conciseness.
- Replaced "but that didn’t stop it from being ruthless to get what it wanted" with "it remained ruthless in its pursuit of survival" to eliminate redundancy and improve clarity.
- Revised "would be to use" to "effectively utilized" for grammatical correctness and conciseness.
- Adjusted the last sentence for a smoother flow, replacing "I do believe that the Ceratosaurus was a very good hunter" with "I believe the Ceratosaurus was a highly skilled hunter."