[kelchm]

If you've made it to your third year at a prestigious university you're clearly not lacking intelligence or ability.

For what it's worth, I ended up dropping out of my second year at a prestigious university in the US and ultimately still ended up getting my degree and finding a path to a successful professional career. I spent a very long time trying to go "against the grain" by focusing on dual degrees in Physics and Art rather than just focusing in on purely CS degree because programming was my "hobby" and I didn't want my hobby to become my career.

Have you considered if Data Science really suits your natural inclinations / drive? There are so many areas of software development that you can be wildly successful in without being a mathematician or memorizing algorithms.

Spend some time thinking about what you've been doing in personal projects and how you can use that to focus in on what what actually drove you to want to build them. Additionally - there are many organizations who do not utilize the whiteboarding type interview format that you're struggling with and will be FAR more interested in hearing you speak to your personal projects and how you've built them.