Overwatch
>main platform is battle.net, owned by Blizzard
>engine is custom made, owned by Blizzard
>IP is original, owned by Blizzard

Deadlock
>only platform is Steam, owned by Valve
>engine is Source, owned by Valve
>IP is original, owned by Valve

Marvel Rivals
>has no proprietary platform, loses 25-30% to platform fees
>uses Unreal Engine, loses 5% in royalties
>IP is owned by Disney, loses 10-15% in licensing fees

The situation is much more dire than anyone here is aware. You can't wave the declining playerbase away with "my queue times are good" when the game's entire future is at risk.