The ability to NOT take things personally is gonna get you much further in your professional life than your ability to code in Python or whatever hard skills you can develop (they are important but hardly enough).

Teamwork is critical for success.
There is NO productive teamwork when there is ego in the room, and when team members take comments or arguments personally. It makes healthy and necessary conflicts impossible to have. There is no progress, no improvement, no perfection without healthy and constant conflict in the team.

Next time when you feel offended, guilty, defensive, demotivated when you hear your teammate comment and argue about something you are working on, focus on the problem being brought up and not on yourself or others.