I would have to say that publicly shaming a company is probably not the best way to get hired.
As a company who is looking to hire someone, they’re not obligated to give you any feedback. Shit, a lot of the time, companies don’t even respond. It just doesn’t work that way. Don’t get me wrong, it would be great if they (and any other company hiring) gave feedback and explained why, but they were looking to hire someone, not mentor them.
May I ask if you even replied asking them for more feedback? Did you maybe think about how many other people they were interviewing?
I think it’s great that you went above and beyond, but that’s not what they asked for. Just because you went the extra mile doesn’t mean that they have to make you feel special, be forever grateful and critique your work.
I wish you all the best of luck, but I really do suggest that next time you be more professional and really do “get over it”.