Well that's an interesting topic. People usually get radical, polarized opinions on the matter.
Some of them have a very anthropocentric, often spiritual/occult/magical sort of view where everything is the product of choice and will, and thus bad things are your fault, and your fault only.
Some others take a cold deterministic materialist approach, where the entire world is governed by a set of strict laws and some initial state/values. In their view everything is the product of the system, including you, your thoughts, faults, or the supposed "change" which was gonna happen under any circumstances anyway.
To make discussion on such a topic even more polarized, people who are favorable to neither side often have to adopt one to oppose someone who is radical about the other. This may make them seem radical as well, but they were just trying to balance the conversation into the middle.
The make the matter even hotter, there's the practical-theoretical divide in this topic. It's well know that in practice, crude abstractions often work better than perfectly precise theories (e.g. using 3,1415 in fast graphical calculations instead of the precise value). My point is that presenting either radical view as truth often makes it quite easy to change the behavior of certain types of people in the desired manner (make them less depressed/anxious, or more responsible, etc), even if those views are not true. This is akin to lying to children about Santa, or denying the dangers of a situation to help someone in danger navigate out stress-free. Even if a radical view does help the person emotionally/psychologically, doesn't necessarily mean that it's true; yet both the person saying it as advice, and the one receiving it as advice are more inclined to believe so if it works.
I think both the radical views are wrong as soon as they deny the other. They have their practical use but as theories they seem to have limited scopes. A theory that could explain the same phenomena both ways would likely be closer to truth (e.g. you are responsible for your actions and their consequences even though they are just a clockwork world happening). This way a person is not "isolated" from the system as an independent entity in full control, but also isn't alienated from his own actions as if those were done by the system, and not himself.