Artificial CoinJoin

i mean that looks super cool, idk nothing about how any of that is working tho
and monero is just simple u know, plug and play type thing lol

What do you think is this a viable substitute for a real CJ with multiple participants?

Absolutely, positively, indubitably not. Any clustering technique worth anything whatsoever will sniff these out immediately. Sure, that single transactions looks like coinjoin transaction in isolation. But each of those inputs have an on-chain history, and each of the outputs will have their own on-chain history. Due to this fact, a clustering algorithm will look at the correlation between the activity of the inputs and outputs. To use a dumb example, let's say that you get paid 0.01 BTC by some employer regularly. Let's then say you send 0.05 BTC to a landlord regularly. If all your inputs to your fake coinjoin come from the same place (your employer), and go to the same place (your landlord), you fake coinjoin will get flagged as being likely a single-signer consolidation transaction. This is opposed to a real coinjoin where two previously independent clusters "collide" at this transaction, and mix the coins' respective histories. Most use cases are most complicated than my dumb example, but hopefully this gets the point across.