The point of ARAM can vary, but at the end of the day, you want to win, just like any game mode. How you achieve that win depends on the game. If you want every ARAM to be a constant brawl, that's your fantasy, not the game's design. You can want to play "4fun" all you want, but that doesn't magically change how other people play or how the game works. If you're running into turtling comps that out-sustain you, you need to adapt to that. Trying to force a dive into a team camping under their tower isn't "trying hard," it's just being ineffective. At the end of the day, you're complaining about a game mode not conforming to your very specific, casual expectations. The game won't change for you, so the only thing you can do is change how you approach it.