You’re lucky to have them.
Without your customers you have no sales, no revenue and no business.
When the line at the post office stretches out of the door and into the street, I think: “How can I avoid doing my business here next time?”
When my cable goes down and it takes 30 minutes to contact tech support, I think: “What other cable providers are there?”
When an app I paid for (with my money, or with my time, and it’s irrelevant which) is slow or hard to use, when it crashes, when it doesn’t work, I think: “Is there another app that will do what I need to do?”
Your customers always have another option. Particularly for products that create needs or activate latent needs (as do many of the apps and services that exist in the modern consumer space), not fulfilling the need is a perfectly reasonable option for most people.
Beware the hubris of thinking that your customers are lucky to have you.