A lot of linsucks programs are built to gtk which used to be great but is now riddled with bugs and dumb behaviours. If you save a file and then create a new folder inside the file picker, it will overwrite the name for the new file you're saving with that of a random file in the parent folder. If you don't fix the name you will end up with incorrect names. For illustration purposes, you may end up with:

/home/user/Videos/birds.mp4
/home/user/Videos/matrix/birds.mp4

Let's say birds.mp4 was a random video and you were creating the matrix folder to collect videos you encountered on here. Then suddenly the name of the file you're trying to save, even though it was ben_swan_pizzagate.mp4. Now you cannot find your pizzagate evidence video anymore, because the crapware changed your filename.

Another issue they introduced in gtk4 is that writing text inside the file picker now executes a find command inside the directory that only shows matches. This is an instance of what I call spastic user interface. You lose the oversight. It used to be that it would simply jump to the next instance of a file / folder that starts with the typed phrase, with the find bar staying in place, and then up and down arrows navigate among the matches. The listing you were viewing doesn't suddenly disappear. Backspace manipulates the find bar instead of being unpredictable. This is much more peaceful.

It turns out there's a setting for returning to the old behaviour but it's reliant on using GNOME. What a joke.

I'm not just nit-picking, by the way. A lot of people are discontent with the new GTK. It's reached the point that someone made a list of GTK2 software. That's useful, although the choice is slim compared to what it used to be. GTK4's omnipresence reminds one of systemd. If you want to have a decent linsucks system, you have to evade gtk4, systemd, wayland, proprietary software, snap... You can do that, until your system adopts one of these and then you have to distro hop again. That's why linsucks users are forced to constantly distro hop. I can't even count on my two fingers how many times I've had to reinstall linsucks.