I'm not an architect but I did go to school for Industrial Design which was tied to architecture in both my undergrad and grad schools so I've had a lot of dialogue with them and we have similar presentation requirements and critiques. Therefore I'll just focus on your presentation and let an architect provide more tech critiques of your work (which by the looks of No. 16 looks quite impressive to me
I don't know how they asked you to provide materials but what you have currently is extremely non user-friendly. People don't have time/desire to open different links or downloads. The images at first are separate thumbs and most of the page is annoying seizure inducing ads.
1. Get a wordpress.com account/blog. Use a template to create your own site that allows visitors to comment.
2. Use a large slideshow on said site that users can easily pan through.
3. Your portfolio pages look very stylish and clean (kudos) but there's not much description of your thought process. What research did you do? concept sketches? ...show evolution of your design and sources of inspiration.
That should be a good start to getting more feedback and in regards to them not providing you with feedback get some of their email address and email some of them individually AFTER YOU'VE CREATED A MORE USER FRIENDLY PORTFOLIO.
They may have had a lot of applicants but some should help ...if not that's pretty shameful IMO.
Finally, don't get down on yourself!
One thing you'll find later in life is how in the world do people with inferior talent and ideas to you get into positions to judge your work? Who knows, but it's a backward messed up world sometimes and just a reality to be dealt with