There are tons of gaming on Linux. It just depends on the games you play.
And thousands of free games. And some paid games.Like Steam and more.
All the software I use on Linux is free otherwise. I've paid $0 since I started using Linux exclusively for more than a last year now.
Anyway, I don't care to convince anyone or argue the point.

✅ Roy's EAW Addons ❓EAW HS ⛽ EAW Tally-Ho
♉ Wine 🍜 Steam ⭕ GoG