CPU - High Load topic

I had a LG g2 before my nexus 6. When for example using instagram app where i "work" with the filters it laggs heavily on nexus 6, instead of on my lg g2 it runs smoothly

I have attached a screenshot where you can see high cpu load even i have disabled background apps, cleared memory and tried "fast reboot":



I have rebooted and cleared everything. I dont want to make a hard reset as i dont see this as a solution.

Forgot to mention that the battery drains fast, and the phone is constantly warm