Irresponsible breeder(s) bred a stupidly powerful dog and sold to whoever had the cash
An irresponsible dog owner bought an inappropriate dog
That irresponsible dog owner sold the dog on to whoever would have it because they couldn't be bothered to follow some reasonable restrictions
Another irresponsible owner bought the dog, probably because it was a bargain and planned to keep the huge dog in a flat
That irresponsible owner admits to feeding it edibles
Yes, of course the problem was the new restrictions, nothing to do with the idiots that breed the dog or its subsequent owners 🙄