I have to say that there is more to this than it appears.
Unfortunately, around the time Aivar arrived, we believe that someone nearby the apartment installed a device with the same frequency as our modem, which caused the internet to intermittently drop out. This is why we asked him to re-start the modem, because we could not find a fault anywhere. We worked over many days onsite ourselves testing the internet and often could not fault it, with our internet supplier, then with an IT consultant to narrow down the cause, before he tried different devices until the connection was restored on the very day that Aivar departed.
We told Aivar what we were doing, to keep him informed. He then just departed without saying a word, or checking with us with regard to the progress of the work. He didn't even call us to advise us of his intentions. He just notified us by SMS that he had already departed. Clearly he didn't want to talk to us, and there was nothing we could do if he had left.
If he had stayed one more day, he would have had a perfect, free, high-speed internet connection, as we have had there since 2006 without any complaints.
Avian may have found the apartment dark for some reason, but we have not had a complaint or even comment about this in nine years. And there are spare light globes in the kitchen by the way.
We did try to help, but the IT issues took too long in this case. At least the internet is working very well now!
I'm sorry that Aivar didn't enjoy his experience with us. It is very rare that this happens, as can be verified by more than 200 reviews on Tripadvisor and (Hidden by Airbnb) at 4.7 Stars (out of 5). I hope he had more luck at the next location.