The OOP paradigm itself requires rather heavy use of abstraction. You can deviate from those patterns to an extent, you can add more polymorphism if you want to

The OOP paradigm itself requires rather heavy use of abstraction. You can deviate from those patterns to an extent, you can add more polymorphism if you want to, you can be selective in using some design patterns like DTOs. But most of the complaints I hear about Java would apply equally to most of the C# projects I’ve worked on, because those are just the annoying bits of OOP. I’d agree the Java is a bit more inflexible, but it’s not like the other OOP languages aren’t also full of boilerplate and layer upon layer of abstractions.