Well SE is giving free upgrades from PS3 to PS4 but they are not forcing the upgrade yet. After 3.0 is released they will probably be pushing the issue that PS3 players need to upgrade if they wish to play at so and so date.

As for not being able to clear content on PS3, I will agree that you are just bad. After a few trys with failures you should get the hang of the mechanics to succeed or someone experience enough would've sat down explaining everything to the new players to said content