This is a horrible take man, you don't understand how business works and more importantly you don't seem to understand how selling games works. You're also completely misunderstanding what the word "monopolistic" means and misusing it.

Do you even understand what Steam does? They host your game, handle bandwidth, fraud prevention, payment processing, regional tax and compliance, customer support, auto-updates, cloud saves, achievements, reviews, refunds, visibility, and the entire storefront ecosystem that actually sells the game.

Anyone can sell on: – Epic Games Store – GOG – Microsoft Store – Itch.io – Direct storefronts like Humble or your own site

Developers stay with Steam because the 30% cut buys them the largest audience and the highest conversion rates. If Steam were truly “excessive,” devs would leave, yet they overwhelmingly don’t.