I don't think it has anything to do with leveling. You have always slow leveled.

I think it might be more related to aspects of your account that simply can't be possible at this pace given the investment you have made in the game. I think the rune levels, equipment levels and talent levels are all out of balance to the investment. There is a specific numeric balance in parts of of the game - e.g. it take 5M coins for every 10K of rune power. The equipment levels and talents are even more straight forward math - this was something you taught many of us.

I believe the issue might be that the account doesn't pass the math test!

I grind every day at VIP7 and the only people on the server ahead of me are VIP8 and above and of course you.