Well that’s because calling his stories complex is quite frankly letting him off too easily - there’s a difference between complex and deliberately inscrutable
See Steven Moffat subscribes to a school of writing previously made famous by JJ Abrams and the rest of the dinguses who wrote Lost in that he understands that being deliberately obtuse about your plot is a cheap and effective way to make people watch your dumb show
I really hate to be that guy singing Russel T Davies’ praises right now because, as Last of the Time Lords, Journey’s End and The End of Time effectively demonstrate, good god is he by no means a perfect writer
But! But but but butt butte he understood that a good story is a good story and that good characters make you care about that good story and what Moffat does instead is beat you about the ears with the same stupid unanswerable questions in an effort to hold you hostage and show up for next week’s episode - and they’re not unanswerable due to complexity, they’re unanswerable because there’s no fucking way you’d know the answer to those questions. What are the Silence? How does River Song know The Doctor? What’s The Doctor’s real name? I don’t feel like watching Sherlock so I can include a Sherlock related question in this list I’m riffing?
There’s a point in all this, I’ll get to it right now
It’s this: if you’ve been paying attention to Steven Moffat’s style of writing you’d have known for ages leading up to this headline that he has no respect for his audience
He’s not a master of “mind-fuck”, he’s a master of “hahaha fuck you”
