>>714786912
>Does it get worse later on? How p2w is it
If you keep your expectation low (as in not trying to compete against actual whales) then it's entirely possible to f2p or light spending.
>Is end game just PvP? Or do careers get harder later on?
Main content would be PvP, but there are single players content that can get pretty hard for the average players. They release different scenarios to train over time.