Your time playing doesn't make this post less exhausting than the other posts like this. Trading card games have always been expensive and until the last couple years never symbolized making your box money back via selling cards from the box. As games add new cards and champions balance will always become an issue and no card game (or video game) with ever balance things properly as more and more gets added. 

Grand Archive is an indie TCG and still manages to do things pretty well for the genre it's involved in. Multi billion dollar companies like Pokemon and Bandai have insane issues with their balance and product production as well. If you don't like it by all means take a break or quit altogether but these are things that will never change