This game is always F2P ... if you create new account every certain period so you will never run out of gems and always have a chance to try the very latest archetype
Afraid of losing event cards from your previous account? Did you not realize that cards from event have very little impact to the meta? Last time Konami actually gave meta cards from events was in 2017
Survival's End actually brought Dinos to tier 3 deck at the moment, but shortly after that Konami did too much powercreep by releasing Neos Fusion. So yeah, we can't compare SE to 2017's Cyber Angel and Amazoness Princess
Forget EX Structure Deck if you are F2P. But creating new account give you a chance to explore the latest box, and you can spend Dream Tickets on any card that suits the archetype from that box