What we think is 'impacting' and 'fulfilling' is all relative. What I'm trying to get across here is that most jobs aren't super exciting. If you're not happy in your current situation, keep looking for a job that IS exciting/fulfilling/impacting and don't complain, because you already know what you want and that's not what you currently have. Of course there are jobs that actually impact the world directly, there's just a smaller number of these jobs available. The Google Search team is a team that changes the world, but good luck joining them.
Go help with the government health care crisis if you want to change the world. Health care systems are in a terrible state for the future.
I'm not trying to be an asshole, I'm just trying to show you that the real world isn't what you've imagined throughout your college career, that's all and it's all good.