Can I make a non-standard arrow stretch automatically? I'm hoping not to have to apply a `\scalebox` manually every time.

Approach to generating non-standard symbols is taken from [here](https://tex.stackexchange.com/questions/216027/how-to-draw-this-diagram).

[![enter image description here](https://i.stack.imgur.com/GZI5Q.png)](https://i.stack.imgur.com/GZI5Q.png)

**Code**

```
\documentclass{article} 
\usepackage{tikz-cd}  
\tikzset{
    symbol/.style={
        draw=none,
        every to/.append style={
        edge node={node [sloped, allow upside down, auto=false]{$#1$}}}
    }
}

\begin{document} 
\[
    \begin{tikzcd}[row sep= 2ex, column sep=0.8em]
        aaaaa \arrow[d, equals] & bbbbb \arrow[d, equals] \\
        c \arrow[symbol={\neq}]{r} & d
    \end{tikzcd}
\]
\end{document}

```