I recently had a problem where Opera GX had been crashing upon start-up, right after the opera start-up had played, then having it turn black and seeming to crash, not opening the app, and without an error message. I found an easy solution to the problem. It may not work for everyone, but it worked first time I tried it.
Go to the Opera GX download page (
https://www.opera.com/gx) and click "Download Opera GX"
Run the file downloaded (OperaGXSetup.exe)
There may be a screen saying "Accept and Upgrade", click the button. If it does not appear, you should be on step 4
Select the file location for where you would like to download the new Opera GX install (example: c:\Users\test\appdata\local\programs)
That is the usual file local for the download, if it was located there originally, change the location of the download.
Click download and wait for it to install. Once complete, open Opera GX and see if the problem is resolved.
I hope this resolved the problem of opera crashing when opened and after the animation, if this doesn't solve it, I am not the best with things and I might not be able to help much more.