not having a CS degree will not hinder your entry into the software industry
I disagree. I think what OP did with their degree was very foolish. A computer science degree would definitely have increased their potential income more than the mathematics degree. Sure, you can still get work as a programmer without a CS degree, but it’s harder.
It’s a shame that when you were reimplementing basic algorithms that you were doing it in JavaScript rather than another language like Java or C# - a missed opportunity to get an early understanding of stack/heap and reference/value, a very important concept.
Also, obligatory “crypto is a scam” comment.