This is far from a personal opinion. It's probably the number one complaint about GTK, and it affects almost all software that runs on Linux since the GTK file chooser is often the default system file chooser. Almost all software opens a file at some point. Web browsers, chat clients, etc. Photos on user's computers rarely have meaningful names because they are often taken with a camera and the default image name isn't changed. This means that there has been no ergonomic way to open an image file on Linux for the past 20 years, and there still may not be for software that uses older versions of GTK. The accepted method is to open the system file browser and drag a file from that over into the application you need the file in. This has had an enormous cost to the reputation of all open source software.