I was just waiting for it to happen. The gaslighting charade finally crumbles.

Tldr: was strongly asked to work overtime again for no reason, refused it (weakly, but it is a start).

(Boss isn't actually my boss, just my unofficial lead at the moment.)

1.4 hours after regular work hours:

Me: boss, this issue is still not resolved but I am out of ideas for it. Already shared my last resort idea twice with you but you don't agree to it. If you are available I can meet you for a short call before logging off for the weekend.

.
10 minutes later, just as I am about to log off.
.

Boss: let's meet. The problem implies something wrong with your code. Let's check.

Me: [ugh] okay

.
Boss then rambles on about a juvenile nsfw joke to describe the situation and I force a laugh, we get to the topic. I manage to explain the situation despite the interruptions from him. Then he shares his genius idea. We agree it might work but the implementation will be slightly tricky. It is now 2 hours outside of work hours.
.

Boss: can you try it out and let me know if it works?

Me: sure, I'll try it out on Monday and keep you posted.

Boss: Monday?!! Look, it is getting on my nerves now, this has been going on for too long (false, since the issue is from a day before not a week before and I had asked for help multiple times before today).
I don't even know what big boss is going to be like. This needs to be done.

Me:. ...
[ You manipulative asshole, I'm not doing overtime for you, I owe you nothing and don't give a shit about your senile nerves. Fuck you and your shit codebase and clusterfuck development environment which makes the hairballs in a public toilet look well engineered.]
Look, it is difficult for me too...

Boss: If not now, I can accept weekend. Because I don't know how big boss will take it. You understand right what I'm saying. This needs to be done.

Me: [Fuck off scum chod! Take your acceptance, fuck it hard, and take it away with you! ]
Hmm. Let's see what can be done.
Thanks for your help.

Logged off.

I can't express the tone of his righteous rage in words.
I have never had to face such revolting attitude before from people at work. I just don't get how people can be so ridiculous. The whole team is filled with chodebags of different sizes.