I think you made my point. You count 5 times:
2007: A reference to single play, the fumbled snap.
2008: A reference to single play, one interception.
2008 regular season: a regular season game, ignoring the other regular season games he played well in, including three straight victories at the end of the following regular season to get the team into the playoffs.
2009: A reference to a bad game on the road with Miles Austin (!) as his top receiver a week after a very good game against the Eagles in the playoffs.
2012: Again, a regular season game, ignoring other regular season games.
Uhh... that happens to all good quarterbacks. Do I need to find five times Montana or Brady or Staubach or insert your QB of choice here "choked" by making one bad play or having one bad game? Re-arrange the timing of a few years in Brady's career and he absolutely gets pegged as a QB that can't do it in the clutch. But because his successes came before his failures, he is considered the opposite.
I mean, you're welcome to not be a fan of Romo if you don't like his style or even "just because", but he was clearly talented and accomplished and capable of playing well when it mattered.
By the way,
here's a good read, that gives a take similar to mine on why the arguments against Romo and his clutchness are overblown.