First of all I am not a Rubio fan, however, Rubio was the TEA Party favorite and the GOPe backed his opponent and were pretty ugly about it.
The GOPe will never trust Rubio no matter how much he licks their boots because of his past TEA Party association. They are working to turn him and may succeed completely.
So, the GOPe is chaffed that the three top candidates are, for varying reasons, not their favorite.
The Tea Party doesn't support Rubio. He is considered a traitor who used them to get in office. There is a reason that Rubio is not running for reelection to the Senate. He would lose in the primary.