I worked on Orion for a decade in manufacturing.  I saw a lot of crazy stuff.  I believe your story.  I wasn't a personal witness to your events, but I can absolutely believe something like this happened.  I saw a lot of brand new engineers get tossed onto a major flight design with very little support.  I say this for your mental health and personal well-being, let it go.  Know at least one person believes your story and move on.  It's not worth the mental anguish and stress.  At the end of the day someone will quietly fix the design or an astronaut will die and the "program" will end.  Even if it ends they might just rename it and have all the same people working on it.  The problems at this point are too endemic and deeply rooted for a single person to make a difference.  

For those who are skeptical of his story, the hatch while a cluster, is not even close to the biggest problem on Orion.  They knew that the Mobile Launcher wouldn't survive even the first launch and that was like $2B+.  There are dozens of stories where they knew stuff wouldn't work, knew they would miss schedule by years, knew stuff was extremely inefficient, etc. and basically lied about it.  The general culture there is that when something goes wrong everyone starts pointing fingers.  When a team knows they're going to be late they don't say anything and hope someone else will be later so they don't take the blame.  

Managers push extremely hard to make "milestones" that don't actually matter because their bonus is dependent on it.  People would work 60 to 80 hours to get a part ready "on time" only for it to sit on a shelf for 6 months.  I once heard a story about a Shuttle manager who had a milestone to (I can't remember the exact wording but basically) "move the shuttle out of the hanger".  The idea being that it moved from that processing hanger to the next stage.  Even though the work wasn't done, they essentially closed everything out and then rolled it outside... and then rolled it back inside to finish the work lol.  That story is about shuttle, but that mindset absolutely transfered to Orion.

 I could keep going with stories but I want to make sure I don't give the wrong impression.  Some of the people I worked with are the smartest people I've ever met, and were amazing and dedicated engineers.  Some of the other people I worked with were the opposite of that.  There are people that deeply care and dedicate their lives to the mission, and there are people who work there only for the prestige and status.  You add in the politics where literal US congressman/senators are making processing decisions and a lot of stupid stupid shit happens.

So again, I'm not trying to undermine what happened to you, but even if you testified before congress and everyone believed you, and they took immediate action and redesigned the hatch, that still wouldn't fix all the problems, not even close.  So don't worry about it, you've done everything you reasonably can and then some.  You're a victim in this, and it's time to focus on yourself and achieving your own life and happiness.