Nintento stabbing sony in the back, without a doubt, must be up there as one of the biggest blunders in gaming business.

Sega... That pretty much says it all...

No way is the PS3 the worst since it didn't affect Sony for more than a few years.

Nintendo motivating Sony into creating their own home console is probably the grand prize winner.

Both of those are true.

MS drm and used games restrictions. E3 2013 showed the gamers reaction to it.

promoting the Vita as a PS3 in your pocket. A stupid decision that set targets too high and created an unfair review system that compared Vita games to their PS3 counterparts. Entirely of Sony's own making.

"in every single regard"

It turned a profit and managed to sell 80 million consoles. Didn't lose any of it's brand appeal. Doesn't sound like a bad business decision in every regard. Yes, the price of the PS3 at launch was moronic of sony.

There's a world of difference between saying sony fucked up with PS3 with it's price point, etc and saying it was a total disaster or it being the worst business decision in the gaming market. 

 Many of posters gave an example of the worst business decisions of the big 3 and other companies that were fair all around. Many of those about the PS3. No one jumped on their ass about it. So the bolded part in your post is a bunch of bullshit. Some users are being defensive about the PS3 over what you said in your post. It's the way you worded it. You didn't try to explain your opinion or make a real point til after the fact. No one is denying that sony fucked up with the PS3 or vita  but it's far from the biggest fuck up in the gaming market. If others can post their opinion while being moderately respectful of others, so can you. 

The high price that sony gave the ps3 at beginning, the sucess with ps1 and ps2 made them believe they can do what they want...but happy to see that sony learned from that generation