1) Jex was not on the mission where the red armor came into play ... that he can remember ...
2) If you would stop picking fights, you would have been able to drive yourself ...

3) No Jedi training ... yet ... I bought Force Sensitivity which gives me all of the penalties of being a Force user, and none of the benefits until I get some training. Let's just call Jex a latent talent, and the recent stresses of dealing with Niil and Trax on a regular basis have pushed him over the edge ... I hear the Dark Side calling ...