https://www.duelarena.konami.com/index.php
Duel Arena launched in June as a F2P browser replacement for Yu-Gi-Oh! Online. It honestly wasn't very good.
This is the second f2p browser Yu-Gi-Oh! game to be shut down in as many years. Konami shut down the desktop version of the casual-aimed Yu-Gi-Oh! BAM last year, though the mobile version persists.
Duel Generation (F2P/Mobile) is still ongoing.
the only hope for non-f2p