So have I, and if this is the kind of trash that swirls through his mind, I'm glad I didn't waste my time.
I tried to read Turtledove's WorldWar series. The first volume piqued my interest, and I foolishly purchased the next 3 tomes thinking the quality would remain a constant (or even improve). Imagine my shock when I could barely finish Volume 2. Sam Yeager is the most repugnant character in literature. And the mindless repetition, the cut-and-paste narrative (you know what I mean), the failure to use the historical giants to full effect, the...well, I won't go on. I didn't even try to finish the series, as you can probably tell.
Why doesn't Turtledove write an alternate history of what would have happened had Gore won in 2000 (titled, the Fall of America)? Or JK in 2004 (Dhimmitude Comes to Everytown, USA)? I love the idea of the alternate history novel (have some ideas of my own that will never see the light of day), but Turtledove is, in my estimation, a poor writer (albeit a very knowledgeable historian).
So have I, and if this is the kind of trash that swirls through his mind, I'm glad I didn't waste my time.
Don't worry... it doesn't end... and Yeager gets worse, finally reaching the point (IIRC) where he turns traitor and tells the invaders that it was the US that nuked their ship. It may be this plot element that seems to have truncated the publishing of this continuing series...
The only consistently good stuff that he's put out is the Videssos series and the Agent Of Byzantium arc. That's about it. His WorldWar series started off OK, but as you said, it went to Skotos (ack, ptui) in a handbasket in a hurry. The rest of his stuff should be consigned to the Void.