Why would the dog matter if it's Allah command?

Assalamualaikum I'm a Muslim but I keep having doubts about my religion and I just needed clarification on this. in a Authentic Hadith By Bukhari it said Muhammad Pbuh killed a puppy/or made the dog get out of his house because he was expecting a visit from Angel Gabriel but he didn't come until later and explained he doesn't go in houses/places were there are dogs or pictures of living things. If Allah commanded angel Gabriel to pay a visit to Muhammad why would the angel be bothered by Allahs creation?. I've look for an answer to this question for about a month now searching every website and I couldn't get a valid or concrete response. Why would Allah angels be bothered by his creation so much that they don't want to be in the presence of a dog? Every answer I got was so bad it lowered my faith almost empty to the point where I was gonna leave Islam . I've gotten answers like "it was because angel jibreal was not an angel of god but one of the fallen angels and dogs can sense evil things so if angel jibreal would've walked in his cover would have been blown immediately. " another answer similar to that "Angel Gabriel was a demon , in the bible it says Satan disguises himself as a angel of light and is a very good deceiver" And there's so many more . Please if anyone is active on this website and they see this message please give me an answer as to why this happened.