I dont think Apple hates T-Mobile.. I think its more like T-Mobile doesnt want to "pay to play"..
1. Apple Store app had no way of pre-ordering iPhone 6/6+ for TMobile (at least not on 9/12, not sure about now). But you could order for Sprint, Verizon, and AT&T
2. Apple.com only sells full priced T-Mobile phone, no T-Mobile EIP or JUMP integration. Unlike AT&T, Verizon, and Sprint (although Apple will happily offer you their Barclays financing for a full priced T-Mobile phone)
3. Apple drop ships iPhones for carriers (at least in the case of AT&T, probably the others). But T-Mobiles phones were all sent from China to Kentucky, then onto their final destinations.
T-Mobile should definitely re-evaluate their relationship with Apple. There's probably a very good reason why AT&T, Verizon, and Sprint choose to "play ball" with Apple rather they try to do it all themselves (and I'm sure T-Mobile knows that now after this launch)