Yes it is. Even when it’s someone else’s fault, it’s your fault.
Whether it’s your team’s productivity, your client’s attitude, your dog’s behavior, your car’s shoddy transmission, your kid’s picky eating, your parents’ passive aggressiveness, your flaky hosting provider, whatever. It’s all your fault.
Everything is your fault because it’s not productive for it to be anyone else’s fault. If it’s your fault, you can do something about it.
So do something about it. Because it’s always your fault.