Let me explain a bit more what they most likely mean.
First off ignorant means : lacking knowledge or awareness in general; uneducated or unsophisticated
So saying someone wants the mentor chat removed because of such things is fitting, if you explained how you did not know this or that because it is your first MMO. Wouldn't you agree such a term fits your situation? esp when it leads to the second part:
"while the noob tank runs in and instant pulls again when they restart and without reading a mentors wall-of-text."
So what they are getting at, people really have no right to complain on the mentor system when the person does not know what to do, wipes, then pulls again before anyone can say anything. This is where the idea starts "If the person is not going to bother listening, then best to abandon"
Once I entered moogle extreme by mistake and it popped. (new player message) and I believe the mentor was trying to explain what to do as people watched cs/ loaded in. Before the "noob insta pull" she said something on the lines of "tanks need to tank swamp here, it will wipe if you do not do that. Do you know how to tank swamp and what that means?" (this was asked just before the noob insta pull) Even with that she did try to explain tank swamping idea during the CS duration. She wanted to make sure the new person understood what she was talking about.
The insta pull noob tank does not answer and pulls, also does not bother to try tank swamp at all even though the mentor one was requesting for it during the fight and noticed noob tank not moving. Ofc it was a wipe and she started to question why the noob tank felt the need to insta pull if they did not understand the mentor tank. The noob tank resorted to this:

Then everyone just left after.