If your opinion is that the C4 content is all "ridiculous" (I take that to mean you feel it will not be fun), and mabi is no longer the fun game you enjoy then you should quit and find something else you will enjoy more than the new mabi.
I am sorta curious though what it is about the new content that you find so offensive though?
I can already tell that you and I are somewhat similar in that we enjoy the learning and building parts of gameplay of striving upwards, not the state of being at the top.
The only thing I see fun is leap attack which was much needed waaaaaaaay back then. The new content isn't necessarily offensive to me. I just find it steering away from what I like; a in-depth story that is at least semi-original. I understand that not everything is just Shakespeare but going from a somewhat original Epic Evil vs Good storyline(Although generic, it had some great twists) to changing the world with alchemy to classic literature?
tips
1- join a better/more active guild
2- take a break
3- try to get friends that do stuff like daily/weekly harder dungeons
for example you're 400+, just get a group of ppl and go do shadow wiz adv once a week
4- start life skills, they're more fun than ppl think and are a nice break from grinding fest
hell, im almost 1.5k, i know my dmg isn't the best since i dont have tons of gears with epic ES, but do you think i care?
I'd like to first start off by saying Darkstar is the best guild I have ever joined. The guildies are nice, charitable yet realistic, and fun. Even when i came back from my break I was still in the guild and was invited back with open arms. Simply doing shadow missions once a week isn't to to revive my passion for the game. As for life skill I will admit they are fun, but tedious... very very tedious...