Looks out of place, does not follow the GNOME HIG as opposed to better text editors/IDEs. Furthermore the text rendering looks weird and feels laggy, at least for me another factor is the use of electron and how opaque VSCode is as opposed to e.g. GNOME Builder.

For GNOME-Builder, if I want to debug LSP-issues, I add "--env=JSONRPC_DEBUG=1" to the commandline and I get nice output. For VSCode? - No idea. In the end I redirected strace for writes to a file and then grepped for "Content-Length", because I was frustrated that there was no straightforward way to do this otherwise.

Another issue I have with VSCode is, that it adds some folders to the project, that's something I absolutely can't stand.

The UX is mediocre due to their refusal to add GUI elements we've had since the 80s because the product can't be allowed to compete against Visual Studio.