Also, I've been getting frustrated with the newer games. So you're not alone. I keep reading through each game quickly to scan for ones I can do easier/faster than others. I've been picking the wrong games. So now, I've been trying to just pick a game I think looks good, and diagram it. If I don't like the looks, or don't feel like I have enough inferences, especially after looking at the first question, I skip it and do a different one.
It seems that, instinctively, I pick the hardest games. Initially, while doing the Oct 01, i freaked. After looking over the games, I was like wtf. But I took a deep breath, and decided to do whatever I could, and not even worry about finishing the section. And I aced it.
If you've been having the same experience, the intitial freak out is throwing you off your game. I'd try to just move on quickly if you're not having an easy go of it, because really, if you've diagrammed correctly and made all your inferences right from the start, then each game can reasonably be done in under 6 minutes.
And I realized I was getting lazy with my rules after doing the PS Pure Grouping Super Drill in the hw section. Try that out, if you haven't yet. It might kick your ass up a gear.