Beta in a Xianxia

Comparison 

Like, really? What could a beta who snapped do that's the slightest bit worse than a CN protagonist? CN Protagonists cripple you, kill you, cut you into pieces alive, some eat you alive, some kill your family/clan while snacking on your girlfriend before crippling you and sending you into an endless void with forced immortality and artificially help you get OP there from an insane desire for revenge... and just when he gets out of that space he gets crippled again and laughed at... then... maybe... maybe... killed.

I know that it's a meme by now that a "good guy that snaps is scary", but the worst the JAP MC could do to a CN MC is doing the same to him (CN MC) as was done to him (JP MC).

Yup, beta MC is synonyme for JP MC for me. 

Beta get OP cheat from Goddess. Beta never offend anyone. Beta survive.
...
...
Beta bcum immortal virgin/wizard.
...
...
But beta always beta. 

Well, depends on what kind of hero you are talking about, if it is the harem seeking kind with cheats then he is probably not going to survive for long or might become  an undead or pet to some immortal
If it is the vengence seeking type, loner type or suspecious and calculating kind then he might survive and even thrive 

He'll survive the entire time but everyone manipulates him to do their dirty work.  

Kinda like the quiet kid in class that gets bullied and endures while smiling and then snaps and goes full berserk at some random point. That kind of reaction.
Or they let their inner 30+ year old virgin take over and learn all the secrets of the world upon entering the world by virtue(?) of being a japanese beta male. 

Those harmless to man and mouse types of people are the most dangerous when they snap, so I can imagine them being trampled on for a while before they snap and let those chinese protags look like a sweet kitten compilation.
Or they turn into enlightend Wizards the moment they enter. 

ofc all of young masters' woman suddenly flock around him and he is forced to confront them all with his absurd cheat like using a smartphone