Week 1: host is very friendly and welcoming. He doesn't speak English very well but that's not an issue.
Week 2: host is a bit more distant. He made some comments about cleaning well after I cook in the kitchen (in which he was right), but in the same time he left unclean (and very smelly) kitchenware without washing for days.
Week 3: host becomes straight out passive aggressive. I later found out that the oven was broken and he blamed me for it, based on a couple drops of oil that spilled out of the cooking pan 6 days before!!! He claimed that oil had gone into the kitchen and burned it (sic). Also he started accusing me of rampaging through his personal stuff in the kitchen (which I didn't) and parking my bike too close to the door (which I did). I tried confronting him about this behavior but he just ended the discussion without even trying to listen to my side of things (which was good because if the conversation continued he would try to blame me for world hunger).
Also one day the internet was dead and I got redirected to a page stating the bill was due. When I talked to the host about this he claimed that it was because of work being done on the line.
Week 4: after the issues in week 3 the communication was brought to a minimum. The environment became unwelcoming, but no more issues ensued.
Also the host put loud music at 8.30 in the morning and 10.30 at night and walked around the house in these hours talking very loud to his phone.
I would let most of these issues slide if there wasn't this foul and insulting behavior