It's possible that the short tenure is holding you back from the companies with a larger engineering workforce, or from higher level roles. To be honest, it's unusual in my experience to be mid 20s with 5 non internship positions on your resume. I recognize this is not fair in many cases, especially if many of them are startups and whatnot. I would try extra hard to emphasize that (not too on the nose) on your resume.

I know the meme on HackerNews and in tech is to always be job hopping / once a year is fine, but in my experience that isn't as normal as internet people make it seem. People who never did the startup circuit are not going to understand so you need to help them.