Photoshop keeps turning off

Try resetting your Photoshop preferences. Press and hold Alt+Control+Shift (Windows) or Option+Command+Shift (macOS) immediately after launching Photoshop. You will be prompted to delete the current settings. You can also reset preferences upon a quit if Photoshop is running by going into General Preferences>General>Reset on Quit.

This action only affects the items found in the preferences dialog box. Numerous program settings are stored in the Adobe Photoshop Preferences file, including general display options, file-saving options, performance options, cursor options, transparency options, type options, and options for plug‑ins and scratch disks. Brushes (and lots of other setting) are not affected by the above instructions for deleting preferences. You may wish to make a screen capture of the settings in the Preferences dialog to reset them prior to deleting of this file.

Also: https://helpx.adobe.com/photoshop/using/preferences.html

To manually delete Photoshop preferences:
Quit Photoshop.
Navigate to Photoshop's Preferences folder.
(macOS only) Open the Preferences folder in the Library folder**, and drag the Adobe Photoshop Settings folder to the Trash from the following path:
macOS: Users/[user name]/Library/Preferences/Adobe Photoshop [version] Settings
Windows: Users/[user name]/AppData/Roaming/Adobe/Adobe Photoshop [version]/Adobe Photoshop [version] Settings

**Note:The user Library folder is hidden by default on macOS. In the Finder, hold down the Option key when using the Go menu. The library will appear below the current user's home directory.
Now you can drag the entire Adobe Photoshop [Version] Settings folder to the desktop or somewhere safe for a backup of your settings

If that doesn't fix the issue:
Go to Preferences > Performance... and uncheck Multithreaded Compositing - and restart Photoshop.
Still crashing? 
Go to Preferences > Performance... click Advanced Settings... and uncheck "GPU Compositing" - then restart Photoshop. Still crashing?