Op your entitlement to have all the things YOU want is astounding.
Surely you can see that a dog can cause massive damage and the LL doesn't know that your dog is well trained and well behaved?
I have been a LL for a long time, (no, l did not inherit any money, was not gifted any money and have no trust fund)
I have seen the most appalling destruction by people and pets. l have been close to bankruptcy twice,in my younger days by people leaving destruction and unpaid rent.
Yet all my properties have always had the correct checks, been kept in excellent condition, all laws and regulations followed, tradesmen called out at all hours to fix any small thing that may go wrong regardless of cost. It is not an easy job.
That is your problem not all people treat properties well. Your anger against your LL is misplaced and unfair.
My advice, honesty is the best policy, offer in writing to replace and repair fully any possible damage, show your current home, get references from your current LL, state where your dog will be all day, where he will be at night, what happens when you go away. Pay an insurance policy if need be.
Most importantly put yourself in the LL shoes for a moment and really think about why this situation occurs and what you can do about it.
I have allowed pets when potential tenants have done the above, one couple agreed at the beginning, to replace the living room carpet at the end of their 3 year tenancy, so they could have their two small dogs.
Another put a hefty deposit down which l was happy to return a year later when no damage was done. But l have also had people who let unpermitted dogs foul a whole flat, chew doors etc and it has cost many thousands to put right.
Sadly l would allow your dog under the circumstances you say but would not want a tenant with your attitude.