Try Mermaid. It's a pleasant experience. And it can be used as a stand alone diagram editor, or integrated with software programs.
TFA could be Two Factor Authentication, but it does not really fit and I prefer to use 2FA. Searching online yields Database Availability Group for DAG, but I prefer to ask.
And all this because SVG export was bugged (not valid syntax) on Mermaid to get similar quality.
Apropos of nothing, LyX[1] is a pretty good stand in depending on one's needs and tolerance.
There are some challenges if you need something that has more complex styles (e.g., customizing the Memoir book styles). These are well within the range of programmers and not super hard if you're reasonably competent and/or willing to search / read. The payoff is that you're forced into using styles instead of kludges, and you don't have to worry about layout (much) anymore.