It's not what she should do it's what she should've done from the start which was to be calculative.
HYBE is a rich corporation that can obviously afford a powerhouse legal team and will sue the cap off her head. HYBE has all that money backing them. She should've made sure she had the financial capacity to take on such a massive entity.
How exactly should she have made sure of this?? Whether it would partnering with one of HYBE's rivals, I'm not sure but it would've helped her a lot if this happened.
I believe she should've waited just awhile longer to build her case and compile all the evidence. But she didn't and HYBE lashed out quickly to sweep her off her feet with a flurry of lawsuits and look where she is now.