It ruins a climactic cliffhanger by resetting the series into square one with the beginning of R2
Fucking Rolo and Suzakick pretty much just the fucking deus ex machina everything, which really ruins the whole concept of well planned strategy.
I wasn't a big fan of how everything can go into normal school days again after what had happened, but I guess this part is just a personal preference.
Marianne and Charles' arc was such a fucking waste of overshadowing on S1 and potential final villain, the series was just on full retard when Lelouch faced Charles on Akasha
In fact, most introduced character on S2 was such a fucking waste of character slot in general:
ie: Shinku pretend to be useful for a few episode, than just become Lelouch's/Schneizel's bitch from that point onward
That bitch with pierced eye was foreshadowed as such a badass, then again turned just be a little bitch against Suzaku anyway, but then again, the entire KotR was such a fucking disappointment considering they were barely beyond mooks and just fucking die like bitches to Karen/Suzaku...
What the fuck is up with Anya's backstory? shit was so random and wasn't even explored.
I'm sure I can bitch about so much more, there was basically almost nothing I could consider redeemable from the second season, and I fucking loved the first season, which made the entire second season such a goddamn frustrating to watch, especially since I was following weekly livestream for it hoping it would get better.
Hell, ever thought about why season 2 was named R2? Considering all the naming scheme of the immortal of the series, and lelouch's romanized katakana initial, the series already seemed like a cop out on what it probably aimed for, but that's just my take on it.