If you are being forced to marry someone because your mom says you are growing too old and once you pass a certain age level she claims “no one will want to marry you” but you don’t want to marry her, what should you do?

Your mom can’t force you to marry anyone.

People can practice absolutely shitty cultural coercion and make your life unpleasant. However, you can and should resist with all your might against anyone, anything, any idea, and any tradition that diminishes you and subtracts from your autonomy and freedom.

It sounds like you dread the fallout of going against your parents or your culture. The answer is to get better at going against people. Learn how to survive their disapproval and demonstrate to them that you can. If they refuse to listen or honor your choices, make sure you’re independent, educated, and financially solvent enough to live without their so-called support. Your future self will be glad you made this investment in yourself now rather than suffer long-term in the hope they’ll come around to accepting you without caveats.