The issue of the woman who meddles in everything at the office

Hey girls, I’ve been working at an agency for about six months now, but the woman at the desk next to me has really made my life miserable. She’s a bit more senior than me, so she meddles in everything I do, constantly giving corrections and stuff, but she’s not my boss. Today, when she criticized my work in front of everyone, I lost it. Honestly, I’m at a loss about what to do because if I quit, I won’t get any severance. How do you deal with people like this? Should I ignore her or should I stand up to her? I’m not sure.