If the MC really wanted something appropriate to deal with Astolfo, he could've just created the Second Death Star and/or accompanying fleet. After all,

So the MC didn't think it's a good idea to tell the JL (or at least Dinah) that Red Arrow is a clone infiltrator? Or that the real Roy is probably still stuck in Cadmus? Or do a little investigating of his own to get some proof?

Relying entirely on metaknowledge (and not using their brain otherwise) seems to be a common problem among self inserts. Does the SI really think someone with Walter's personality will just let him go? He'd have better luck playing along until he convinces Gus that Walter is too dangerous to stay alive, wait for Walter to get killed, then convince Gus to let him retire (likely after training Gale or some other replacement).

MC seems to be relying too much on his metaknowledge and not enough on his powerset. Between his telekinesis and telepathy and a bit of common sense, he could've easily kept up with deviations from what he remembers and captured Chesire.

Everyone involved should consider themselves lucky it wasn't a Serious Table Flip....

While avoiding cliches is a valid concern, the reason some things are cliche is that they're such a good idea that people with a brain go with them. As other commenters have noted, occlumency pays dividends the earlier one learns it, so there's no good reason not to learn it ASAP.

There's really no need to be so dramatic over Supes not being there for Superboy. It's really an easy solution: tell Ma and Pa Kent. Problem solved.

Danzo and Hiruzen are the Imposters in an Among Us game on the Konoha map.

That sword...

Given the climate at Uruk, just imagine if When Day Breaks shows up there....

Hulk: I cast Fist!

Spandam is so stupid that I wonder if he's a Liu Adou expy.

So true:

Luffy's so stupid that Albert Einstein and Steven Hawking needed to be born to balance the average intelligence level of the universe.

That brothel must have some amazing seal work, because there's no way Hiruzen can be still alive if his telescope jutsu can peep into the red light district.

Hold on... is the MC supposed to be another Grunt SI variant? For a supposed military otaku, he's acting more like a hypercompetent Gary Stu than, say, Kouta Hirano from HotD. Unless he's not as competent as he thinks he is? If that's the case, reality inevitably slapping him in the face should be funny. Kinda has happened already, what with showing off to the extent he did in school and assuming he'd still be in Team 8.

Hiruzen can't die soon enough.

Yeah... if Kiba wants to go after Hinata, he better sic the mantis shrimp puppet on Naruto's nuts and officially turn that mouth-breathing moron into a proper Naruko, if you know what I mean.

Haha don't underestimate hair and pelt manipulation. One of the characters in Worm, Parian, can do something similar and that ability can take on Behemoth.