Some PS5 players are even getting refunds.
Mortal Kombat: Legacy Kollection has not launched in the best state.
Indeed, while we heaped praise on the game for its excellent interactive documentary and wide selection of games in our 7/10 review, we noted that the online functionality is simply not up to scratch at the moment. Additionally, an issue in which lowering the in-game difficulty setting doesn’t provide adequate respite for players struggling against the AI has also been acknowledged by developer Digital Eclipse.
Read the full article on nintendolife.com

It’s always tough when a highly anticipated release faces issues. It’s good to see that the team is actively working to address the problems. Hopefully, things will be sorted out soon for everyone involved.