Disclaimer: I'm not saying the website doesn't have issues (for example, the award calendar), but working in networking, I've seen too many issues that came down to browsers and middleboxes (firewalls, proxy's, NAT's, etc.) before immediately declaring that it's all the fault of the website. You can now return to mocking me and telling me I'm just a DL fanboy that should have his *ss kicked off FT.
I would tend to agree. DL's website does have its issues and its quirks, but it's certainly not as bad as the angry mob here would have everyone believe. IMO it's usable for what I need (i.e. booking flights). I can even book award flights on the website. I agree the UX sucks for award bookings. It requires a lot of "workarounds" to book low award flights, but the point is that I can still get them when they are available.
And now I shall be flamed as well.
As one of our R&D managers said: "If you want to wait for a software version that never has bugs, it will never be delivered..."