Final Cut Pro crashed, and now immediately crashing upon launch EVERY TIME

Whenever the application crashes you should trash the settings. Hold ⌥ ⌘ as you double click the library you want to open to launch the application. A dialog appears asking you if you want to Delete Preferences. If you don't do this while double-clicking your library, just opening the application, it will open a default Untitled  library.  

There could be a matter of timing. You need to press and hold both Command and Option keys immediately after clicking the FCP icon.

You should see this:

Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.

the app crashed.

What are your FCP and OS versions?

You should completely remove Chroma as well its keystone daemons. They're resource hogs, running continuously on core system functions.

The system looks unusual can you explain what's going on. Do you have two system volumes? Do you have an Update that's on a separate volume or something else.

You should also trash the application and reinstall it.

it doesn’t fix anything.

There is something else I would like you to try other than deleting the environment settings, so please refer to the link.

●What to do when a problem occurs