The MCU and Marvel Comics depictions of Drax the Destroyer are two wildly different characters with only a few key similarities, with the most obvious being their shared desire to kill Thanos at all costs. However, there is another similarity between them that not many MCU fans caught, as the live-action version of Drax actually fulfilled the cosmic purpose assigned to his comic book counterpart (without even knowing it).
https://screenrant.com/drax-fulfilled-cosmic-purpose-thanos-mcu-marvel-comics/