I would have felt the same. All those streets, taverns, shops, places, even brothels turned ashes. It would make any dwarf angry and bitter. Sacking dwarves home city is certainly a way to get Book of Grudges - not that there is a such thing in the Westeros.
Tyrion didn't even had a bottle of wine with him to make the journey easier. He had nothing, when Tyrion explored the palace, and its underground chambers to find his brother .. and sister. The first time he was asking wine, was when they had thrown him in the dungeon.
For being a wise dwarf Tyrion continued being ill prepared for his fortunes. He should have know that he was going to end up locked. At least he acknowledged that Varys was right and he was wrong. He also rightly asked, "Would have burned the city?"
I believe that to most of us the answer would have been, "No."
It's just when you look back in the history, this same thing has happened, most recently in the Iraq War, and things haven't really changed to better since. Nobody really misses the president who started it. Nobody is going to miss the Mother of Dragon's. Not the Mad Queen, but the one who came across the Narrow Sea to liberate the Westeros from the shackles of the Iron Throne.
The only Hitler reference I want to put in is the July 20th Plot, where his own men tried to take his life. It was a failure. Close call, but failure still and it proves that there are only very few occasions, where you able to assassinate a leader.
I'm glad that Jon saw the reason and understood that it was the only time he could have done it. Otherwise he could have as well turned Vader. The way he did it, outrageous and possibly the hardest way to kill another, with a kiss on lips of your lover while you stab them in the chest.
Drogon, the Wise, did the right thing and burned the Throne to slag. Nobody is going to sit in it. I did fear that he would have taken Jon, and in a way, he would have been in his right. That throne was not an evil thing, but it was cursed as it made people to do horrible things.
Now there is going to be peace as the Long Winter settles over the Westeros. Bran is the right choice to lead the Westeros. All hail Bran, the Broken.
I love that Bran's first action was making Tyrion his Hand. I also love that Jon end up back being in the NightWatch. He will be good leader in the North, and it will be proper place for him to contemplate the past. And this way he'll be back with Ghost. All hail King of the North.
If they'll ever do the spring book, they should do it in ten years, giving enough of time to GRRM to finish his Magnum Opus.