I don't believe you are expecting too much from T. But I do believe you are making some assumptions about T. You're assuming he read the email and chose not to respond for whatever reason. Or doesn't want to respond.

But what if he hasn't read the email yet? Or what if he read it and wants to respond but there is something preventing that right now?

I think your feelings of anger and disappointment are completely natural. But if the issue is THIS important--and SU is, in my opinion--then you need to pick up the phone and call T. When you call, you can say "I'm disappointed I haven't heard back from you, and this is what is going on with me, and I need some support..."