For some reason, I keep stating that the "text box" is not part of the "normal" text editing options.
Sorry about the confusion.
For me, from using other packages, before LO Writer, these "text box" options lean toward turning text into graphics and then inserting it into the text. So the "hard to do in Writer" was the standard text options and not the graphical text options.
Once you create the text box and place it into the document, do you have to leave the document for a "pop up" dialog to edit the graphical text instead of just clicking on the text and editing the character[s] that were wrong? If so, then it is outside the normal text editing process, so "outside" Writer's document "window". Yes, you are using an extension of add on package of Writer, or of Draw from Writer, etc., so I just got use to saying it is "outside" of the main package.
I stated this for Word and maybe OOo as well. I do not remember the last time I used the "text box" options inside Writer. Maybe it was in the early days of 3.x.x.
I tend to do graphical text in external packages like Inkscape and GIMP, then add the graphics in and anchor it where needed.