Is it childish of a guy to regret being friendzoned for a reason?

[scooogy]

[Unknown_Swan_]

No. We are all humans, and we all regret many of things we have done in the past.

Regret is a human emotion and the human condition. We do things on a yearly, monthly, weekly and sometimes daily basis that we regret doing.
Is it childish to regret something we have done or allowed to happen? No. It's a normal feeling and process that we use to learn from our mistakes, and ensure that we make better decisions in the future.
If you have been 'friendzoned' because of something you did in the past, or you allowed yourself to be belittled by the person who 'friendzoned' you and stayed in a cycle of toxic situations to your own detriment, then regret is quite normal.
As long as you don't turn that regret into anger or depression, use regret as a tool to ensure that you don't allow yourself to be caught in something that's bad/toxic again, or that you don't behave in a certain way in the future that led to the 'friendzoning'. After you have successfully done this, then try to let that regret go.

Feeling regret is fine as long as you use it as tool for your own betterment, not as a tool to turn you bitter and rageful.

[CallmeTheKnight]

It's not childish at all. You just had a realization.

If she friendzones you, she intends to use you.
Next time a woman proposes to be friends, tell her that you have enough friends and leave it at that.

[Guy13]

NO‼️ Who wants to sit in the missing gay friend 🪑…if you like the girl picking up the pieces but no rebound or “make me feel better” action

[Honesttguy]

So at riest you wanted to be friendzone but then regret it later?