As author of an open source tool that was already steatlh-forked twice without any contact whatsoever by VC-backed startups - including clearly copying text from my website/FAQ - without giving any sort of credit on the idea/implementation they used for 80% of their product but on the contrary claiming how revolutionary their products are and best idea since sliced bread, and even not satisfying the basic MIT license terms, I can completely understand your frustration.

At least they were nice enough to pay you a trip to Seattle and (briefly) mentioned your project in the release announcement, I didn't even get a "thank you".

As a result of this I re-licensed my code from MIT to OSL-3 and reduced my involvement in this project a lot so I focus on the things that actually matter in life: my wellbeing and spending the time with my family.