“My friend gives me advice I didn't ask for and acts superior”

What could be going on

One-up, one-down: grandiosity and shame (Terry Real): Fits if they relate from above, needing you below to feel okay.

Moral superiority: Check whether they cast themselves as the better person generally.

You feel small or stupid around them: If you feel small with them, notice it; it says something about the dynamic.

Compulsively rescues: A milder cause: they may compulsively fix; check if they help unasked with everyone.

Communal narcissism: Could be grandiosity through being seen as helpful or wise.

Also said as

• she lectures me about how to live my life
• my friend always knows better
• unsolicited advice from a smug friend
• why does my friend talk down to me
• friend gives unsolicited advice
• my friend is condescending