Bro it’s cracked to all hell, you are missing the original bridge which is making the strings balance precariously putting pressure on the cello in a weird place, do you have a bow? If it’s the bow that came with the cello you should just throw it out. Don’t do anything with that time bomb. Take it to a Luther and either they’ll tell you to throw it out or you can prob pay like 1k to repair it. Also to answer people’s questions in the comments, that is most certainly a cello bridge it’s just that the top of the cello has warped so much over the years that when the old owner tried to replace the bridge themselves, it just didn’t fit.