why such small 64 player servers?

https://www.youtube.com/watch?v=3iGU_FMjbY8

the servers constantly rotate maps so I cant learn a single one, each time im throw into maps i have no knowledge off vs players with 1000 hours that can smell me across the map, i constantly die immidiately to people i dont see, trying to figure if that pixel of foliage is actually the enemy and not just map asset. other half is me being mortared, shot by helicopters, enemy or teamkilling. i do not want to spent 500 hours before i start having fun and dont want to spent triple amount of time just studyin...

This game was so ♥♥♥♥♥♥♥ good, and nothing has quite hit the itch since. prob in my top 5 forsure

what do i do?