I fail to see how Captain Marvel getting relaunches is viewed as her failing when Marvel does this to darn near every book they have. There have been five Avengers relaunches since 2010. Are the Avengers a failure? This is just how Marvel works now.
I get that, but I can also see the other side of the coin. Variety means more options. People get books they may not get normally. Even if they don't last or are "stealth minis" (as Marvel rarely likes to list things as anything but ongoing), it's still letting fans of that kind of stuff get something they rarely get.
It does get kind of overwhelming going over the solicits because of that, though.