Whatsapp buggy on MacOS

Why is Whatsapp so buggy on MacOS? I've been using MacOS for only months now, and Whatsapp has been updated at least twice during that time, and the same annoying basic bugs as before. In Whatsapp on Windows, those bugs were removed years ago when Whatsapp appeared. For example, when you go to a conversation, randomly the text box doesn't "activate" but you have to first click on another conversation and then back to the one you wanted to write on. That is a really annoying bug if there is a lot to write in different conversations (workplace, home, school, hobbies, etc.)