Remove breakpoints off your method and use them inside the method as that can cause your debug to take a very long time.
Try running IntelliJ as admin. I had this issue at work where debugging was extremely slow and running as admin actually made it a lot faster.
Method breakpoints may dramatically slow down debugging
There is a simple explanation from the IntelliJ Team: “Method breakpoints will slow down debugger a lot because of the JVM design, they are expensive to evaluate”
https://intellij-support.jetbrains.com/hc/en-us/articles/206544799-Java-slow-performance-or-hangups-when-starting-debugger-and-stepping