Bocchi the Rock fails at being both a good SoL and a good show about musicians. If you're coming to this show looking for one of those aspects (or both) then leave as I assure you there's plenty better than Bocchi, you can even stop reading here if you want. If you've already watched it or just want to see my reasoning then feel free to read on.

Plot:
Bocchi is a Slice of Life/Coming of age story about a girl who learns to overcome her shyness by playing her guitar. That might seem like a decent idea but that might as well be as deep as it gets as that's Bocchi's entire personality. She plays the guitar 6 hours a day because she wants to be famous and that's somehow the easiest way for her to become sociable/earn friends. Not only is that logic asinine but it's an incredibly shallow means of friendship to yearn for. It's also just bizarre how this laid back SoL/Moe tries to give some almost shonen-esque "I want to be the very best" goal for our MC. You can't even try and argue that the show doesn't pigeonhole itself to one genre as it very much does.

Bocchi:
Bocchi's portrayal of social anxiety is a joke and feels like the author just looked at memes on social media about how hard it is being an introvert and took it at face value. She automatically goes into spastic outbursts whenever confronted by anyone to the point to where it's a miracle that her friends keep her around given how uncooperative she is even with them. If Bocchi did exist in real life she wouldn't have any friends, but this show seems to favor Bocchi in a way that many self-insert anime do. Bocchi can never do anything wrong, she's always just a poor misunderstood musical genius and you have to bear with the fact that she shuts down like a damn computer at the mere thought of making eye contact with someone. Realistically Bocchi doesn't face any real trouble.

Characters:
The rest of the cast is as boring as it gets. We've got Ryo who was somewhat enjoyable at times but just a dick to everyone else for the most part. The Redhead who's the foil of Bocchi, and by that I mean while Bocchi's entire personality is being an introvert, her entire personality is being an extrovert and nothing more. The Blonde I don't even remember what her personality was or at least I don't even know if I could describe it. The main four feel so archetypal and boring that I can't really say anything more. A good SoL can take these character archetypes and make them feel very naturally fitting, Houkago Teibou Nisshi for example does a really good job at this. All the other side characters are again just reduced to one trait.
Another thing I find bizarre is how Bocchi's father in particular has his eyes censored out. I see that this trope seems to happen a good deal in a lot of newer Moe shit where they seem almost scared to even show a male character on the screen for some reason. I'm not saying that your primarily female cast show needs many male characters in it or anything but it's frankly weird when they go to lengths such as that.

Art:
I'll Segway from characters to character design for art, as it makes a good enough bridge. I think the character design is unimaginative and ugly. There is no balance as all the bright colored Power Rangers tastelessly leap in front of your face. I'm fine with bright colors after all this is anime we're talking about but please give good balance in relation to the characters they'll be around with throughout the show. Hidamari for example does a good job at this.
One thing I'll give Bocchi is that it's production is great. The weird animation sequences are neat and all but I think they were mostly made as internet bait, made with the intent get clips posted on the internet of how memeable this "Literally me" show is and so you can have at it with your twitter/discord reaction images. Not only that but the wacky animated segments are without fail always used on the same joke where Bocchi is in one of her free-form-freakouts over having to talk to a person or whatever.
The music is alright I guess, none of the songs ever stuck out to me. The one thing that did irk me in particular is that when Bocchi and her friends go to the psychedelic rock concert it didn't sound very psychedelic at all, just typical J-Rock. Maybe that's my own issue for expecting Hendrix or the Flaming Lips but it is what it is.

BOTTOM LINE:
Bocchi fails on all fronts that it tries to venture into and fails at nearly all of the basic fronts that a story/anime should be expected to meet. Funnily enough I went into this series thinking "wow it's going to be like K-On but they actually focus on being in a band" but I ended up appreciating K-On more, not only for having enjoyable characters but also for having better songs despite not nearly as much being about the music.