[a3voices]

First of all, relax. Life isn't about accomplishment. It's about conscious experience. Everyone who isn't Bill Gates, Mark Zuckerberg, or Elon Musk is a "failure" compared to them. And they in turn might be considered failures compared to Augustus Caesar.

If you want to get better at taking tests, then practice them a lot. It's like getting good at chess. Anyone can do it, even people of average intelligence.

As someone else said here, you could first go to a community college and then transfer to a full university.