if I've created account/wallet on coinbase or any other exchange then my account is hacked and my coins/money lost who are responsible for it
The Exchange where I've created account

is it my mistake

what's you thought about it

and how i make my account safe

none responsible for it, it's your fault because it does not provide strict security and also your fault for making a mistake so that your account can be hacked.
its better to bookmark true link, and its better to use 1 email for 1 broker account, and beware phishing link.