I'll try to be polite and factual when writing this...
The long story short. We had a short conversation about a time I would arrive between 9-11am. Meanwhile, he added me to a random group I knew nothing about - the host should make guests aware that they are being added to the group. The host did not message before my arrival, so I was unaware how desperate he wanted me to check in.
At around the discussed time, he texted me and asked me where I was. He seemed angry at the fact I had not contacted me earlier. After a short discussion...I told him I wasn't aware I HAD to check in at the discussed time and there was no choice - he has work commitments which I wasn't aware of. I also mentioned the group he added me to and he stated I SHOULD read all the rules of the house - I imagine 90% of all guests DO NOT read all the information.
He ended by telling me I had an attitude problem and he would cancel the booking.
It's funny people talk about attitude. He cancelled my booking because I didn't text him before the stipulated. Whilst I understand that might be not convenient, HOSTS should be more patient with guests. Not every guests texted at the correct time or arrives on time. As a Airbnb host, you should be aware of a variety of situations that can occur on arrival.
Anyways...I found a new place with a more tolerant host.