Is it shameful for a 28-year-old boy to work in a hot pot restaurant?

No shame. According to the query recruitment network, the waiters in hot pot restaurants are not low-end industries, and their work income is stable, with social security or five insurances and one gold. There are also organizational training, league building and so on. If it is a large chain enterprise, there are opportunities for promotion. Make money by your own skills, don't steal or rob, and get paid by your own labor. A person's value can't be measured by the existing salary, so you must keep fighting.