Wii U
Xbox One
Cyberpunk 2077
Evolve
No Mans Sky
Anthem
Fallout 76
Nosgoth
Lawbreakers
Radical Heights
Culling 2
WWE2k20
Halo MCC Online
Bleeding Edge
Avengers
Stadia
Ouya
Battleborn
Mass Effect Andromeda
Balan Wonderworld
Babylons Fall
Various reasons from poor marketing. Bad game. MTX practices. Broken. Rushed. Collectors editions shipping the wrong stuff. Wrong Place Wrong time. No one cared. etc. This past decade I've seen more big disasters than any other generation and the 90s had a number of them but not this bad.