1) Seems like your career progress should have given you more confidence in yourself than was naturally provided by your background. There's an expression "fake it till you make it" that might apply. If you can't fake it, can you take courses or work on open source projects that will upgrade your resume?

2) Do you have control over the tech stack of tools you work with? After a period of unemployment I got a dev job at a tiny company that allowed me to choose the tools and the framework I chose at the time (ExtJS) got me head hunted to join a much larger better-paying company six months later.