George R. R. Martin Didn’t Want the Show to End:

If something were making me rich without my doing more than turning up at Emmy parties, I wouldn't want it to end either.

Literally the entire existence of the show itself! If he just wrote for one hour a day he would have totally finished by now. I know he's busy and probably travels a lot to take meetings and what not, but portable laptops are a thing, no? WTF?

No. Simply not. The show was consciously dumbed down to satisfy its average audience, not because the writers couldn't do better.
The story could easily have been condensed without much of the crap that happens from the end of S5 on. Even the end of Stannis could have been condensed further and made to make sense if he had been murdered by his own men refusing to go on a suicide campaign rather than escaping a lost battle all on his own to bump into undetected Brienne by mere chance.

The story was adapted to please the 13 year old figurine buying crowd.

While I am not sure finishing the show in 13 seasons would have been a wise thing to do but I feel that the show has been rushed since season 7 (if not season since 6). There should have been 10 episodes in season 7 and the show could have been stretched to season 9 with 8 episodes each in S8 and S9.

Here is a topic I wrote about this some time ago: Why was GoT dumbed down?

If you look a little more carefully, D&D improved in several instances over Martin's teenage crap, whose writing often appears to indulge in presumably "adult" themes from the view of someone who is just leaving childhood. Transgression as a value is a teenage mentality, not an adult one.

They stopped refining the writing when they realised they were going the wrong way for their audience, who wanted more action, more dragons, more "girrrrl powerrrr!" and above all more Stark reunions and Stark victories. The promoting of actors has another, albeit related purpose. As they were dumbing down to make more revenue, they also became an active part of the business in which relations determine what you do next and whom you work with. Praising new actors through their show was giving them and their employers fresh, new opportunities. What good are you to the show business if you're not taking advantage of your success to create new stars to milk further? Do not wonder why D&D and some of the GoT actors are now becoming part of the Star Crap family. This is the next level in "family" building and money making.
Then you get some idealistic fools to misunderstand this as a flaw in their writing abilities. It seems the fools have no idea what this is all about. They believe it's about doing justice to the books of some fat fuck somewhere.

D&D knew from the outset they would aim at 7 seasons. This decision was taken at a time when they believed GRRM would finish the story before and it was based on observation of other successful TV shows. Success was their target, financial obviously. They didn't want a show that would trail into increased cost for dwindling revenue. This has nothing to do with them "being lost without GRRM".
Listen to their commentary and you hear what they want their audience to hear. Of course they pose as one of them and they give them what they want. It's part of the public relation circus that makes them rich.

I had no intention to give you a detailed exposition of any of what I find either in the books or in the show. I know there is no point debating with book fans who can't see their obvious flaws and still take their author seriously.

In other words, I see no point discussing with you. My views have been expressed at length and in details on this board. If you're interested, you'll find them. If not, why should I care? 
You're the one acting like a butthurt pussy after being told it has bad taste and poor logic. Well, pussy off, then.

Hello Marv. Where have you been?