Failed? I don't know really, I don't think it failed. It should've gained them their money back at least for sure.
When it was released I played it a lot. From release date until may. I loved questing and personal stories, I enjoyed choices I could make, shaping up my character the way I wanted her to be (a badass antihero), at end game I farmed warzones and had alot of fun pushing ppl into traps.
Then, as usual with mmos, bad things cought up. First of all, I don't like star wars. So universe already didn't really keep me in. Second, graphics and engine overall were dated and pretty bad. I still remember those terrible loading times and I have a very powerful pc. I couldn't use orange gear on my max lvl character, I had to stick to ugly default gear and look same as everyone else. They fixed it much later on but it was way too late. But what really killed the game for me is that they kept allowing premades to play warzones vs pugs. So my winning percentage went down from about 80% per day to barely 30. "Find your own premade" was never an option for me, so I had no other choice but to simply quit.