Hello, Thank you for your feedback . Do you have any suggestions to improve the game ? 

yes then as a suggestion I can't say what to say to ascertain good rewards in the gold 4 arena, in practice every week I take things that are not needed. then for the boss of the clan taking the last nightmare chest it is a fortune if in a week of collecting me some books come out, not to mention these unknown splinters unfortunately. if you want to grow more bets for more substantial rewards that stimulate playing.

They want you to struggle. So you buy the ridiculous overpriced packs. The game is designed for Whale spenders. If you are not that it is fine ofcourse and you can still play. Just on a way lower level. Dont think you get showered by free stuff and good deals :)

I think you misunderstand the financial model.

Games like fortnite, wow, gw2 etc provide lots of content and their goal is to retain players who will spend moderate amounts regularly to support the game.

Mobile games such as gacha games try to get as many people to download as possible by sponsering everyone on youtube and massively advertising. The goal is not retention, the goal is that when people inevitebly hit the paywall a percentage will respond by spending a fortune. Some will do that and some wont quit even when they are no longer having fun....google 'sunk cost fallacy' to understand why people keep playing even when not enjoying..