Because 2e didn't do that. Poor decisions about certain products being made during the edition did it.
The coach never made it to the Superbowl, so he was a failed coach, despite a winning record. As I said, you can be a failure without being bad.
Yes good things can fail and bad things can succeed, but no D&D has ever failed. None. Not the one I hate the most and will not ever play again if I have my way, not the ones that I bearly played (and even then only after they were out of print), not the one I am playing now, not the one I love the most. Not the one I started with and even though it's flawed I have a soft spot for.
the coach did make it to the big game every single time (basic, 1e,2e,3e,pathfinder,4e,5e) and he mostlikly will every time going forward... however some times he won by 80, and some times by 5. winning by 5 isn't a failure just because other times you won by 80.
any company that makes RPG would beg borrow steal, maybe even kill to 'fail' the way 4e did. because it was still a HUGE successes just not enough of a success for wotc to be happy.
I know 2 small business (one my local gaming store) both run by friends/acquaintances I knew BEFORE the business.
One failed and went out of business (no gaming store anymore) it did so because it cost more money to run then it was making. It did this for a few years and in the end the only way to keep it open would be to sink more money in and not take pay to run it... this was not able to be done.
the second is NOW going strongish... it is in the black. the owners (there are 2) 1 works else were and took a small payout (not anywhere near enough to live on if he didn't have a 40+hr a week job) and the other takes a small pay (more then the 2 other players but still not alot) if he was living alone he would have issues but he lives with family and can meet his bills. However in year 1 they had to sink money and go into dept to open this... technicaly they are still in debt... BUT they are making more then the min payment on that debt AND paying the 1 and the 2 employees and the other owner is taking a bit of profit... if things stay as in (not better or worse) in a year or so they will be out of the debt and as such more money to profit...
that second store would never bring in enough for Walmart to keep it open... the profit is too small (although there) so it would fail for Walmart but succeed for a small new business. Not just would it be closed if it was walmart but I think such a small profit could count as a failur... however not every store walmart closes is a failure. some are sucsesses (and I am sure the two above small buisnesses would kill for 1/10 the profit a failing walmart has)
see big companies don't want good they don't want success they want growth.
you or me can be happy making $72,000 a year (there was a study done that is the magic number...don't know if it is true or not) however cost of things will go up of course (nothing ever costs less look at gas prices) so that number of 'happyness magic number' will have to go up too. however there is some set of it where X is what you need to live and Y is fun spendable money and Z is money for savings... right now (or when study was done) 72k is what X+Y+Z equaled... the thing is X and Y have to go up (I would say Z too) to match costs. (I have NO IDEA HOW TO DO THAT %...SOMEONE WAY SMARTER CAN BE MORE EXACT)
but for big companies X+ Y+ Z isn't enough... they need P+X+Y+Z... and P is greed. It is MORE then you need. it is growth. SO if they make X+Z+Y (adjusted for year) today, then tomorrow they have to make X+Z+Y+1, and the day after that X+Y+Z+2 and if they keep making X+Y+Z+P where P is an ever growing by 1 that is good. but it isn;t great they would rather P go up by 2 instead of 1... then 3 instead of 2.
WotC saw "missed sales" because there was a competition (for the first time in 7 years I think) that was making X+Y+Z... and even thought 4e was making X+Y+Z+P that P could be higher if they got some of the XYZ from that other company...
if I build a new computer that doesn't mean my old one failed... it means I wanted a new one. if I buy a new car that doesn't mean my old car failed... (Now maybe I had to get a new computer/car because my old one failed... but just getting a new one doesn't prove the old one failed)