It's all a matter of opinion. I don't think Viki has the better website or tv app at all. There's not much structure to it really. Until Viki got rid of their Samsung app I used it but it was hard to navigate. I used DramaFever's Samsung app, it worked and looked great.
Yeah, your title is click baity. lol. You are blaming DF for things that are normal business practices (getting licenses is what they are supposed to do. Don't be mad with them because they outbid Viki, be mad at Viki for not stepping up their game) and for something that was out of their control (AT&T is a horrible company with no regard for customers not DramaFever).
Basically it comes down to both Viki and DramaFever had their strengths and weaknesses. To me Viki's strength is also it's weakness, subtitles. The translations are excellent. They explain the little things (nicknames, idioms, cultural sayings) and even translate background music lyrics. Can't beat it. But if the drama isn't popular the subs come very slowly if at all and there is no episode description. Every streaming site has this except Viki. DramaFever had quick subs but they were very bland. No cultural nuance.