I think you described the problem that I sense in Marianne very well. She judges people based on her own understanding and takes pride in her own sensibility.

In describing Edward's admiration of Elinor's drawing, she thinks that it

"was very far from that rapturous delight, which, in her opinion, could alone be called taste."

Only "rapturous delight" could be called taste? Very narrow minded thinking which, although she claims otherwise, does not take into account differences in temperament among people. To Marianne, it is either all or nothing. People either have taste according to her standards, or have none at all.

Again on Edward:

"His eyes want all that spirit, that fire, which at once announce virtue and intelligence."

All virtue and intelligence can be announced with one look in the eye. Again such narrow thinking out of Marianne.

But Marianne is also only sixteen and has not yet seen much of the world. I am looking forward to seeing how she might change.