A new line in the Petrov Defense

Take a look at this new Petrov Defense line, I call it the Petrov Defense: Spanish Variation, give me a review and tell me what you think of it

Wow. Has it worked for you?

I'm very concerned about black going c6 and pushing the bishop back.

I'm not impressed by it. It looks dubious and it wastes a lot of time in many lines

What is the difference between a dubious opening and a bad opening?

The commenter's level of politeness.

What is the difference between a bad opening that has a small chance of succeeding in comparison to an opening that has no chance of succeeding?

Any opening can succeed if the opponent plays badly enough. But you don't want to count on that.

Is it possible for an opening that is considered bad to actually work if both sides play perfectly?

That depends on your definition of "bad".

It seems like an invitation into the Berlin. Other than that I don't see any reason why someone would play it since there are many other good lines for white in the Petrov's.

How about this? I took this analysis from another user, it's not my own.

1. e4 e5 2. Nf3 Nf6 3. Bb5 c6 4. Be2 d5 5. d4 exd4 6. exd5 Bb4+ 7. Nbd2 cxd5 8. O-O O-O 9. Nxd4 Nc6 10. N2f3 Bd6 11. c3 Re8 12. Bd3 Ne4 13. Be3 a6 14. Re1 h6 15. Qc2 Bd7 16. Ra1 Rc8

What are the different definitions of a bad opening?

#13
There is objectively bad and subjectively bad.
Objectively bad is an opening that loses by force when played e.g. in correspondence.
Most gambits are objectively bad, but may yield good results in parctice especially in fast time controls.
Subjectively bad depends on the opponent, on the tournament standings etc.
Here is an objectively bad, but subjectively good opening: black defeats the reigning world champion with it at the top of his shape
https://www.chessgames.com/perl/chessgame?gid=1068157 

"Any opening is good enough, if its reputation is bad enough." - Tartakower

It is often profitable to play something objectively bad. The opponent has to think.
Good and bad are like fashion.
What was bad yesterday is good today and will be bad tomorrow.

#11
"there are many other good lines for white in the Petrov"
++ Which ones? Carlsen tried in vain to find one against Caruana and Nepo. Kasparov could not find one against Karpov.

Just because Kasparov couldn't find a decent line against Karpov when using the Petrov doesn't mean it's bad for white, positional players like Karpov, Petrosian and Kramnik know the Petrov Defense far better than a dynamic player like Kasparov would. It's like saying Rockstar games are incapable of creating realistic looking models for GTA 6 simply because none of the previous GTA games had models created solely for the PS5/Xbox series X.

Try looking at the game by Damiano featuring the Petrov Defense where he whooped his opponent.

#17
You mean this one? That is not representative. Black plays badly.
https://www.chessgames.com/perl/chessgame?gid=1336243 
This is representative:
https://www.chessgames.com/perl/chessgame?gid=2136005 
And this
https://www.chessgames.com/perl/chessgame?gid=1067208 

The game that you showed with Carlsen vs Nepomniachtchi was a draw, as well as the one including Kasparov vs Karpov, none of them make white look bad.

After 3...Nxe4 it should be 4.Nex5.