@space49 You may find better answers if you ask in an Elementary OS-forum. But for what it's worth, here's what I think.
Newer versions of opera often require newer dependencies; apparently you need to get a newer version of libgcc-s1 ; not sure whether you can do that on your OS.
The version of Elementary OS you use is quite old. Probably the best solution would be to get a newer OS.
To remove the old version of opera, try sudo apt-get remove opera. You may be able to reinstall it by downloading an older deb-package. I am not sure where you can get an older "stable" but "beta"s are here: https://get.opera.com/pub/opera-beta/
Or you could try a snap version or a flatpak if that is something Elementary OS allows.