As someone already pointed out, try to increase font size first.
I personally use a Vector layer and put text there (not sure if it even works in paint layer). For making it bigger you can then just grab the corner with Select Shapes Tool and resize it. If it doesn't work, enable Scale Styles in the Tool Options docker.
I do like it, but I have sadly fallen down the tiling wm rabbit hole. It's too late now.
It has been mostly i3 for me. Not for everyone, but I like the control.