TYO: Opposites Attack

Question

With two respond to drivel

But three is nearly evil

With five display your pride

While six you wish to hide

Inspired by @tyobrien's template

Answer 1

Assuming only six, the word is

badger.

With two respond to drivel

Ba is a common syllable said by babies, e.g., in "ba-ba." Alternatively, "Ba!" is a very dismissive remark.

But three is nearly evil

Bad is evil to a lesser degree.

With five display your pride

A badge is a mark of honor and worn with pride.

While six you wish to hide

To badger or pester someone could cause them to want to escape by hiding.