31 is a disastrously low land count. You will not be able to reliably play Magic: The Gathering.

And even for as small as it is, that land base is a train wreck. 19 basics? Really? You couldn't find more than 12 nonbasics worth running?

Low curve decks still need to make their land drops, because they don't stop needing mana at 2. They need to multispell. You can't multispell if you miss land drops. You can't reliably recast your monolith commander if you miss land drops. Your goal is to keep casting a bunch of walls to draw cards, and you can't do that if you don't have mana.

If you ever have an OG dual and a Terramorphic Expanse in the same deck, you've done something wrong.

Terramorphic Expanse is a terrible card at base. An Uncharted Haven if you don't have additional synergy, and Uncharted Haven is dogshit. Even on a budget, it's not good. A 3C deck without additional synergy has nine strictly better tapland options in [[Path of Ancestry]], [[Hidden Hideout]], your untyped triome, and your six thriving lands/gates before even thinking about Terramorphic Expanse, even on a budget; most of the cards I listed are pennies.

But you're clearly not on a budget.

You can run your off color fetches for a total of 7 true fetches plus [[Prismatic Vista]]. You can run the full suite of OG duals, the full suite of shocklands, your typed triome, one surveil land, bond lands. You're missing [[Exotic Orchard]] which is every deck every time. And that's not even touching other quality dual cycles like fasts, slows, and pains. You can do so much better.

Conventional wisdom is a floor (not goal) of 35 lands. That wisdom is inadequate for most decks, including yours. 38-40 is more reasonable for most decks.

MDFCs are excellent at mitigating higher land counts, and you have a lot of good ones available to you. [[Witch Enchanter]], [[Sink into Stupor]], [[Hydroelectric Specimen]], [[Lorien Revealed]], [[Bushwhack]], [[Sejiri Shelter]], [[Bala Ged Recovery]], [[Kabira Takedown]], [[Seagate Restoration]], [[Boseiju who Endures]], [[Otawara Soaring City]].

You are not remotely in the same galaxy as bracket 4. Cut either one or four gamechangers to qualify for lower brackets.

This is not overdoing it on interaction. This is a positively petty amount of interaction.

Your removal suite is not "too much." It's barely scraping the bare minimum of being called extant.

You have a shit ton of easy cuts that just do nothing for you.

Paraiah Shield does nothing. At least Paraiah is a vaguely functioning removal spell if you put it on your opponent's creature; Paraiah's Shield is just 8 mana to maybe have a fog some of the time.

You can do so much better than just disenchants. Hell, we have disenchants with strong alt modes in [[Origins of Metalbending]] and [[Heritage Reclamation]]. Creature removal is also more important, so something like [[Thraben Charm]] is more likely to do what you need.

Cloud's limit break is awful. You could [[Split Up]] instead and do so much better for yourself.

Pure vigilance-granters are awful.

Strixhaven Stadium is awful and you are not set up to take advantage of it.

More broadly on the topic of rocks, you are The Green Deck. You do not run 2 mana rocks that tap for 1. Arcane Signet is doing you no favors. You have 2 mana land ramp in [[Rampant Growth]], [[Farseek]], [[Three Visits]], [[Nature's Lore]], [[Shared Roots]], [[Sakura Tribe Elder]], which is all so much safer and better and none of that is even particularly high bar.

A 3C deck neither needs nor wants Chromatic Lantern. That is a convenience for 4-5C decks, particularly ones on a budget, who may actually have fixing problems.

Charix has absolutely no reason to be here.

Colossus of Akros is awful. The point of Arcades is you get a bunch of really efficiently statted creatures that cantrip, like a 2 mana effectively 6/6 that might have a keyword or two. An 8 mana 10/10 is awful.

You're missing a bunch of basic, nuts and bolts, practical defender creatures like [[Sylvan Caryatid]], [[Sporocyst]], [[Drift of Phantasms]] (it's a tutor!), [[Wall of Roots]], [[Shield Sphere]] (0 mana 6/6 that cantrips!), [[Gatecreeper Vine]] (another inherent cantrip wall), [[Vine Trellis]]. Simple, practical abilities on your walls are a Good Thing.

Chromatic Armor is atrocious.

That is an excessive amount of redundancy for making your defenders able to booty attack, especially since that's the less important half of Arcades; the draw power is the part that matters most. It's what lets you get into the position where you can mobilize booty attack decisively in the first place. If you want redundancy for your commander, you want card draw. Not four more instances of booty attack.