I started working with Rust last month, and wrote about 2000 LOC since then. While I had my fair share of errors coming from the borrow checker, I've always found its complaints to be valid and easily resolved. Except for that one time where I tried to shuffle data between different threads and shouted at the borrow checker for two hours, until I realized that the borrow checker was actually right and what I tried to do was literally impossible without data races.