AITA for trying to make my business work?

"we" opened a coffee shop and hired a small team: Jake (barista), Lisa (baker), and Tom (delivery driver). It quickly became clear they were all difficult. Jake was sarcastic and rude to customers, Lisa was grumpy, and Tom constantly complained.

I held a meeting to address the issues, but they shrugged it off, saying they were just there for the paycheck. In a desperate attempt to improve morale, I organized a mandatory team building event at a bowling alley. Im really considering to fire them and find a new ones.. But despite everything..

I implemented a policy against rudeness, but that only made things worse. I eventually met with each of them individually and learned they all felt unappreciated. I made changes to their schedules and gave them more creative freedom, which helped a bit.

But it's still not great, and I feel like I’m fighting an uphill battle. AITA for trying to manage a team of rude employees, or should I just let them be themselves?