Summoners War: Chronicles

Is this some kind of a joke?? i spent £100 on getting this and it does less damage than a 3 star maxed 

I have most of his skills maxed hes 100% crit 70k hp and 150% crit damage and does 3k crits ?

I feel scammed ! seriously i want a refund !  and his stun doesnt even work ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????