I disagree, there are some points I feel he could optimize.
Teneflix's team is very weak to Ho-oh- he lacks any move to OHKO it while having a couple of mons that definitely hate its presence. However, screens+psong gengar is very innovative as it bypasses the usual problems that klefki set has with defog arceus (and ofc klefki still cripples latis so it's all good on that front). SD Ghostceus is also a pretty smart teamchoice as it at least makes him less Ho-oh weak than when using CM. I don't think dual ghost are that bad either, Psong gar actually beats Darkceus and 50-50s Darkrai while Espeed+Brick Break Ghostceus has a chance getting past the aforementioned mons as well. However, Yveltal becomes the real problem as Klefki doesn't have lefties.
I definitely think the problem comes with going full gimick on the Yveltal and not running Stone Edge on Groudon. I can kind of understand the Yveltal set as the team really wants a sleep absorber, but U-turn on choiced Yveltal forces too much prediction. I'd also go lefties on Klefki just to be able to check opposing Yveltal better. I think 5 turns of whichever screen you need might just be enough in this case.
Steels team is too boring haha, I mean me, him and Astounded used those teams quite a bit in tests and they kinda work but eh. It's not something very creative to say the least.
Wreckdra's team is interesting, I just think it needs to run Protect Gar and Jolly Ekiller to not be weak to opposing Ekiller.
Half of Two's team is also boring, but not a bad team at all.
I vote for Wreckdra and I have to Teneflix a gold star for the cool idea of screens+psong gar.