TBH I don't mind Rika's team, I think Whiscash and Camerupt are a little underpowered for an E4 but Gastrodon would largely be a sidegrade and Quagsire a downgrade, and having Water/Ground representation I think is a good thing. The main thing I think is actually comically weak for an E4 member is Dugtrio, and there are two nice replacements with either Sandaconda for Sand Spit to try and make use of the type's weather, or my preferred option of Toedscruel to form a neat fire/water/grass core.Back to being annoyed at Scarlet and Violet. Geeta gets a lot of (deserved) criticism for her team but the Elite Four shouldn't be ignored, either. A full third of the two latter member's teams have a 4x weakness to Ice, and one speedy Ice type rampages across their teams in general. Rika tries with her typings, but Whiscash and Camerupt weren't great options in Gen 3, and they look even worse now.
Similarly, I think Poppy's team is pretty good, though Bronzong is another meh choice for an E4 team. Levitate is nice to an extent but it's also just too weak. Paldea has Lucario for another offensive pick, Orthworm for another "you can't just EQ through this team" pick (and Orthworm is currently repeated on Nemona's team so it could feature here despite being a Titan), or once again my preferred choice of Gholdengo. It would add to the stature of Poppy as an E4 member a lot to have such a rare Pokémon IMO.
Larry's team is straight up comical though. Besides perhaps Staraptor and maaaaaybe Flamigo, none of them feel appropriate for an E4 member's team. Flamigo sorta gets a free pass on account of all the E4's teams using Paldea mons as their aces and (Kilo)wattrel is used by Iono while Bombirdier is a Titan, and since Iron Jugulis is a Paradox mon and this is pre-Area Zero it leaves Larry with only Flamigo or the even worse Squawkabilly as choices. But as for the rest of the time it commits the number one annoyance I have with Flying-Type teams which is that it's mostly full of birds. Gyarados, Jumpluff, Drifblim, Vespiquen, Vivillon, Salamence, Masquerain, and Dragonite are all in the Paldea dex, yet Larry uses Oricorio and Altaria instead? Assuming they don't want a dragon here since the next E4 member is a dragon, I'd replace them both with Drifblim and Gyarados. Tropius can stay since Jumpluff isn't much better and it wants something not fully weak to Electric-Type, and also Tropius is comically good this gen for no reason in rands so I'm partial. That way the team is also 2 birds and 3 not birds which feels much more epic as a flying trainer to me.
TBH though I think of all of them Hassel's team is the most fine. While I'm not against a whole team of pseudos, I prefer it not to be the case to show off some of the other mons, and so Hassel's team does well out of the Dragon-Type picks there are. You could make a case for Appletun replacing Flapple so it's not quad weak to Ice-Type thanks to Thick Fat, but Flapple is generally more threatening than Appletun outside of that so hey.
I'm not going into Geeta because any other team would be better lol. But yeah overall I think the E4 do an alright job, with minor edits outside of Larry's team which I think is a let down.