Curious why you think the Chase card sucks....Care to elaborate?
I tend to think it is one of the better cards out there for me (USA based - Chase Sapphire Preferred). Am I missing something?
The UA shopping mall can work fine. It can also be a nightmare. I have not had any awful experiences, but have had some issues with having miles post. The credits do not happen quickly and it is difficult to track.
I would expect if you used them regularly, you would start having issues pop up. And the resolution of them is not necessarily easy.