The best would be to contact the support about your dissatisfaction. They will answer and help you as soon as they can: support@shinyboxgames.com
Thanks for supporting DQ!
After Ascension, you will start over as level 1. So, you have to leveling back to 99 again, for “being strong again”, If you still feel, you hero is too weak, take a look at the Build Compendium or the Guides section. Or you could ask the community directly for help: http://forums.dungeon-quest.com/c/gameplay/build-help