Tell me the full program software for drawing LaTeX diagrams and control systems schemes. For example:
I know TeXample and Overleaf, but I own it badly, because writing these schemes in the programming language for a long time and is enjoyable, but I want something in the type of Visio, naturally with the possibilities of LaTeX on editing and formatting formulas and plots.
I would be grateful for the advice and help.

tikz-cdbased diagrams, there is yishn's tikzcd-editor. Or maybe, TikZiT suits your needs? – Jasper Habicht Mar 22 '21 at 06:42Maybe, LaTeXDraw suitable for this?
– dtn Mar 22 '21 at 07:28Do you own this package well? Could you draw that the scheme that I brought in my question and show me?
– dtn Mar 22 '21 at 07:35tikz-cd. It is difficult to learn at first but you will be able to do it faster after some practise. Specifying coordinates, distances, sizes etc. in code is much more precise than drawing it with a tool, so the result will be better aligned, more consistent, easier to modify later, and easier to integrate with LaTeX notation inside the diagram and with the flow of the document in general (for example no external files or tools are required). – Marijn Mar 22 '21 at 08:27I have never done this before. Could you make a simple sample code as an answer, which draws the scheme specified in the question. It could serve for me a good starting point.
– dtn Mar 22 '21 at 08:29