By looking at your power, you neglected to focus on increasing your power while you continued with the story plot line. Because of this, you won't be able to catch up with those who are 40k at level 80 as by the time you get there , they'll have a higher power than you. First of all, you need to look at the various sources of power. If you don't know, look at the "Power Up" *on at the top-left corner. It's isn't perfect but it should give you a foundation. Question these questions:

What is your level in refinement? Level in battle armour? Have you max awakened you ninja? Have you upgrade your equipment as high as possible? Have you been doing team instance and getting better tools/leveling tools? Have you been doing your group skills? Max cultivate ninjas and summon runes as much as you can? There's a lot more ways but these should help out.