Why is work so important for you? I think you’ll find that a large number of people simply go through the motions because the stakes are low and their lives outside of work are more interesting. To them, it is an exchange of labor (that isn’t valued anyway) for (not enough) money. Why push yourself at work when it simply doesn’t matter? And what will drive you nuts later is that people from that “lazy” group will eventually end up promoted over you. The work is ultimately inconsequential, but the relationships built matter.
I don’t really have an answer for you other than to introspect a little bit on your work ethic.