(Warning: English isn't my native language) Before you assume I am a SB69 hater, please check my MAL. The first season is listed as my favorite and I truly love this franchise. The reason why it scored this low, is because of my disappointment. Yes. I am very, very disappointed in this season. Heck, even the specials had better writing. Sanrio could've done so much better. I wasn't expecting a solid or deep story, but Show By Rock # was a true trainwreck imo. The plot was all over the place. Whereas S1 had a very clear premise, it seemed like the creators themselves didn't really know where theywanted to go with their story in S2.
So we have this issue with the Dark Queen, then Dagger jumps in again, Tsurezure are plotting on something and there's also ACAREAFACT boycotting Shingancrimsonz. Oh, we also get Bud Virgin Logic's personal struggles as well. And some backstories (which were mostly really nice btw).
But honestly, that's a lot for a series with only 12 episodes, especially if you consider they still managed to add some episodes where the story had little to no progress.
Then again, the story itself felt like a carbon copy of season 1, except we got a lot of new characters, that had barely screentime.
What disturbed me the most is how the series seemed to make a big deal out of certain events, that were solved in a few seconds. Evil characters turn into cinnamon rolls after they realized their love for music.

I think it'd be a better idea if the series sticked to the games canon. It had so much potential... I know I was expecting too much, but the beginning made me expect those things. It seemed like they took a little bit 'too' much plot and weren't able to handle it.

Look. This series wasn't bad. Just disappointing. There were a ton of great things too! As I said earlier, I was really happy to see some character getting backstories. As usual, the music was amazing too! I loved the song at the end btw! I also thought it was great how we got to see a lot more of the in-game bands! Every time one of them appeared, I was so happy! And I'm also really thrilled that my hc's about Ailane turned out to be canon!

Even though I'm bitching a lot about this series, I hope (but doubt) they'll make a third season. At the end I still love the characters, artstyle, music and general idea.
Yes this series was disappointing, but I still love it somehow, if that makes sense.