I know people like to hate Halo Infinite for a number of reasons, but IMO battle passes are one thing they do fine. MP is free, while the $10 battle passes are optional and you can buy and finish them any time.

I’m still on season 2 while everyone else is on 4 (I think?) I play a few rounds once a week, maybe, but there’s no FOMO because you earn the rewards at whatever pace you want. Once you finish a battle pass you can buy the next one. Or you can buy them out of order or skip any of them.