No, there is no negative equivalent. And on the whole, even for other operators, the negative ones not always work as expected. An combination like you explained is not possible. You probably did see my post about using the TextArea widget for this kind of questions.
JS will perhaps be the easiest way, but I'm not yet convinced it cannot be done with Advanced actions. Will tell you when I give up. My first idea is to use an extra tracking variable and split up the combined condition in 3 decisions.
Lieve
Sreekanth, it works perfectly. Created this conditional action with 4 decisions. I used the learning interaction Scrolling Text in CP8 (because now you can control the variable - which means I could have a Reset button):
First decision:

Second decision (third is similar to this one)

Fourth and last decision

I put the words in variables ( v_first ... v_fifth),, that is a reflex I have since I'm using shared actions that much. The associated variable for the TEB (which you can now reset to an empty var in CP8) is v_TextArea and the boolean that will decide if the positive feedback (StarOK) has to be shown is v_TA_OK. If you want to show a negative feedback, put that in the ELSE part of the last decision.
FYI: it took 15 minutes, including creating assets and variables and testing. Personally I would have needed more time to do it in JS, but that is just me.
Lieve