It's not nice to attack the T, in any fashion. There's even no reason to raise your voice when speaking to T, even if about "jerks" on the outside...as it's stressful and not necessary anyway. (Use normal adult voice conversation range.)To imply T doesn't know what they are doing, to call them names personally, berating them, none of that is good. How much would you like to hear of that, if you were the T? A good T won't take it personally, but still, why submit them to that stuff? Your beef isn't about them, they are there to HELP you.

It is your session, so unless you are in a religious setting where you would certainly offend, it's up to you what language you use to describe your feelings and thoughts.

It is usual for a boundary on physical abuse to be set. Thou shalt not hit or throw things at the T, nor threaten T in any fashion.

etc.