If what you say is true, that shelf stacking was something you did reasonably well and didn't need anybody there in order to get it done, I don't think you'd have much to worry about. But you also mention you need a manager to motivate you at your next job, so I'm not sure what you'd be looking for.
Regardless, you find no motivation in getting paid (the "certificate from society"); and presumably no motivation in democracy; and no motivation in not fucking over your workers and their livelihoods; and no motivation in living up to the most basic expectations of adulthood; and instead you'd only be motivated to, "log many hours of work and do little work during those hours", I'm not sure what kind of motivation you are expecting from a capitalist. Do you know of a job right now that people love doing that has nothing to do with paying workers, social justice, or helping people that would pay you to do nothing?
And, quite honestly, I've worked plenty of jobs in capitalist areas where people that show up with a deliberate attitude to screwing over everyone around them and logging, "many hours of work," while doing, "little work," has ended in a beating.
Nonetheless, there have been arguments made for socialism because a restructured social condition would greatly ease the work everyone would have to do. If you are interested in doing as little as possible despite whatever value you have in yourself or others feel about you, there's always what Marx's son-in-law wrote in support of Marx (but which probably didn't go far to impress his father-in-law:
The Right to be Lazy.
Alis Volat Propriis; Tiocfaidh ár lá; Proletarier Aller Länder, Vereinigt Euch!