The way I see it, the more complaining somebody does, tends to be equal to their alpha or beta status. Complaining is generally more beta in nature. You don’t get as much complaining from an alpha male. I’ll put the reminder in here, that alpha males are not the chest beaters. They are in control of themselves, and therefore don’t have a lot of reason to complain. A lot of complaints are about feeling out of control, being exasperated by that fact, and consequently whining about it. People that complain too much, are not very attractive. IMO. I think it goes both ways for males and females. The way I look at it, it’s not nice guys versus bad boys. It’s alpha males versus beta males. Alpha males are actually pretty nice guys. Beta males can be nasty, bitter, life has done me wrong, complainers. Again, all of this is just my opinion it does not have to be your truth.

Actually decent guys don't complain because they have no reason to. They don't feel their behavior earns them anything or makes them entitled to anything.

I'll let you know when I meet a nice guy.

I am told I complain endlessly, and I do.
I never stop, I bitch, whinge, complain and nag.
I drive people crazy with it.
It even drives school kids into completing assignments just so I will stop.

Some guys have all the luck,

You left out a possible answer: A heck of a lot less than a rude/pushy person.

I've found that self-described "nice guys" rarely are.

This one doesn't

I don’t think there is enough information given to answer the poll.

Google incels to see where nice guy-itis leads. Be prepared for horror. Disclaimer "nice girls" are a thing too.