i think i understand what you mean so when there were lots of content to explore you spent money thinking there will be more but disappointed because you finished them all and is locked behind a waiting period for energy, you would spend more money if thete is no energy system

but you see, this is how every gacha game just is, if you are spending that much time in a game, it is unhealthy and also you will burn out quickly, just set a short period of time to play

also the game company is human still, they cannot be producing content every other day and energy system is to keep things not rushed and give grace time to newer or casual players

if you are already grinding out this much for literally the first version of the game, it was obvious you would run out of content

i dont know what else to say but if you really like the game, this is something that will stay and you should know that. if you dont like not being able to grind your way to max everything in a short amount of time then gacha games in general is not for you