进了开发者模式不能关闭的，闪退的同学可以进来交流一下，官方出了解决办法了

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Launching in Dev Mode

If you find your game in a Developer Mode state, there are two possible reasons and respective fixes:

Having multiple users on the same Windows profile to play DOOM, even if it is with different Steam IDs, can cause this issue. We recommend using individual Windows profiles instead. Save games are held under each individual Windows profile, and sharing the profile between multiple players can cause issues.Activating a console command will put the entire game into Developer Mode, causing any further save progress to be flagged as developer-only. This includes any new Campaign save games created, or any old Campaign save games progressed, even if no console commands were active during the play of that save.

If you make use of the command console, you will need to delete any Campaign save file that has made progress with a console command active and then relaunch the game in order to continue playing without Developer Mode. We recommend moving your existing save game file to a different folder and then restarting the game. When doing so, you should temporarily turn off your Cloud saves in Steam, too. This will avoid Steam replacing the unwanted save file with a backup.

上面一段是官方解决办法，貌似和你的WINDOWS多用户有关，建议只用一个用户文件夹，第二个方法就是把自己的存档放到另外一个地方 然后关闭STEAM云服务，删掉存档，再把存档放回去，不知道理解的对不对，求大神指导