I have no particular insight into the inner operations of the Texans FO, so I'm not going to speculate on accountability or lack thereof as it pertains to Kubiak and his players.
However, that being said, from an outsider perspective, the fact that Joe Marciano is still here speaks volumes about a perceived lack of accountability with this franchise. What the heck does that dude have to do to get fired?? Certainly fielding the worst special teams unit in the league won't do it, which is a bizarre disconnect that you rarely see in pro sports these days.
"Football is only a diversion." ~ Houston Texans, Inc.