One thing I always like to note when it comes to the topic of emacs configurations: Mine has steadily gotten smaller and smaller the longer I used emacs.
I'm a relatively new user. I started with Spacemacs, switched to doom emacs, and more recently finally crafted my own config.
The evolution of my .emacs.d was a constant "Do I really need a plugin/preconfiguration for this?" and for me the answer was "no" most of the time once I researched it, so I removed it and either switched to the default, or emacs builtin functionality.
Nowadays my config is ~130 lines as well, which includes a few lines of documentation and notes since my config is an org file. If I had to trim it down further (or set up a config from scratch to get to work as fast as possible) I'd say that I could trim it down to only a few lines.