Honestly some of the things I've seen working somewhere dog friendly, I can absolutely believe it tbh.
There's just a growing number of people who think they should be able to do what they want, regardless of the impact on other people and act like they're the ones being wronged when someone objects to being impacted, usually while demanding that they are treated with the respect they flat out refuse to show anyone else.
I've had to deal with complaints from people who don't like the way a dog, a child or indeed an adult is behaving and approach them and ask that they modify their behaviour (or those they're in charge of) to show consideration for the people they're sharing the space with.
I've had people rip into me for that, and other people rip into me because I didn't do enough - I'm not responsible for other people's behaviour, they are. But in the 'staff' you've got someone who everyone can shout their displeasure at because they know it won't (or will rarely) lead to a confrontation and if it does, they'll come out on top because 'customer service'. So whether the complaint is reasonable or not, or the behaviour is reasonable or not in situations of public places that are staffed, the only people getting shit for it are the staff.
One of the pitfalls of the customer is always right is that means every customer expects to be treated that way regardless of their own behaviour.
I'm a dog lover but quite frankly I'm getting fed up of tripping over them, listening to them bark and whine, being snapped at because I have the temerity to deliver the food or drinks ordered to the table, being told off because I won't allow a dog into a dog free space (or being balled out because I ask them to move having seated themselves in the dog free area) or insist for dogs to be removed from the dog friendly area because someone wants to sit there but not near a dog. And that's just at work, I have a whole other lot of stuff I'm fed up with in daily life!
There's unreasonable on both sides of this argument, some of them own dogs and some of them don't, the common denominator is humans who can be so self absorbed and refuse to treat others with respect yet demand they're treated well. With those types who are dog owners, the dog is simply an extension of themselves.