Playstation 2 -- just boring and clearly lacked the same creativity that Nintendo and Sega put into their console's names
Wii U -- Wii is stupid and the U doesn't make sense and it sounds like a siren
Xbox One S/X -- It's gonna be so hard to differentiate these two when talking to a layperson.
New 3DS -- Why does it need to be "new", why not 'Super'
PS Vita -- Doesn't really deserve to be on the list, it's just ironic.