Hey there fam! Something you might consider is that different people want alt game modes for different reasons. In our research, we found a TON. Here are just a few:
- More casual, less intense gameplay
- Lesser time commitment
- More opportunities for creative outplay
- One-for-all style allowing for solo play
- Zero abilities, only gunplay
Spike Rush meets some of these needs, but not all of them. It sounds like it wasn't your jam, and that kinda blows. But hopefully you'll find something that suits you better in the future :)