hack steam account by user is possible?

Hello, I have never used hacks or hacked anyone, but after a few years I wanted to enter my Steam account and I realized that it was stolen. I know this because i have GTA V and it is associated with my Rockstar account, but the Steam account changed as if it were a bot and now I want to get it back. I wanted to know what are the ways to give back what he did to me thx

Did the person who hacked your account change your email address? If not, maybe a password reset will allow you access again. If so, you may be able to reach out to their support team and explain what happened. They should have an audit history of your account and if you provide them the email address it was under previously, there may be something they can do to assist.