It was my first time in Berlin. I came as a tourist but started looking for a workplace, with hopes of getting a blue card and continuing work.

I searched online, going through some hiring platforms, and sent out a few messages around. I felt a special connection (I thought I was exactly who they needed), and wrote them a carefully crafted letter of intention alongside my lavish CV.
They got back to me, and I was given this task, to do while at home. I completed it, had a phone interview, and was invited on-site for a face to face interview. Everybody felt warm, I felt a connection. We already talked salary expectations, and all was going great.

They told me they'd get back to me for the next stage. ...
and they actually DID. Yes, they did!
They invited me for a second interview, but this time to prepare a technical topic to present. So I did. I picked one of the 3 topics they offered, which was about performance optimization. I had recently read materials about that, so I felt really empowered.
So far nobody told me what I was supposed to be doing at the new job, I only knew the technologies required, and what the company did for money.
I prepared a thorough presentation, with practical demos of why some things are bad for performance. While I was showing it, many people in the room were learning about this for the first time, which means I did good. The team lead had some extra questions that I wasn't able to answer in full (needed some research), but otherwise it was great.

The CTO then asked me out to lunch, to talk over some more stuff, and we had a general discussion about what drives us, our life story, etc. He said that he'd really like me to be part of the team, and that he's looking forward to working with me.

So I've been at it for almost a month. I've met everyone, got acquainted with the team, knew the biography of some of them, proven my worth, etc. I was ensured with body language, and verbal language that everything was going great. As careful as I was with this kind of stuff, I was positive that I'd get the job. I even started planning my trips, to get the documents ready.

And then I got a message stating the usual stuff "Thank you bla bla bla we don't think we'll need your services". I was shocked, but in good faith I wanted to reply something along the lines "I'm sorry it didn't work out, all the best in finding what you're looking for", but I found out that I was blocked from contacting them.

That's right. Rejected + blocked. After a month of fucking foreplay. I get rejection, even though it hurts. But being blocked?! That's just insane!