That's just so obnoxious of you to say that - so arrogant. You might think that, and you're welcome to you subjective opinion, but you're wrong - objectively.
The thematic premise of the series wasn't lost in the last two seasons, and the characters remained "rational" in their decisions and choices - even Dany tipping over made perfect sense. I swear you people haven't really watched the last two seasons (of course you have, but your words indicate that you must have missed something). I'm watching the series again, and I'm in Season 7, and it's ALL dialogue so far - good dialogue. So for you to claim that the writing was "objectively very bad", when other people who know what they are talking about liked it very much, just shows that you are the one who really can't be objective in your evaluation.
And while popularity has never been a true measurement of quality, the continued piling on of fantastic projects is - and I as pointed out above, D&D continue to get newer and greater projects.