Mine is that the useState hook is an actual plague on the entire React ecosystem. Regardless of your opinions of React, if you wanna use something then use it right.
C is easy to understand and find vulns? AI is uncovering decades of vulns in C code that humans hadn't seen since the code's inception. And they aren't logic errors but memory management errors. Not a single day goes by without a CVE in a C/C++ project about memory management.
Both languages are walking vulnerabilities.