GoG is going through the same growing pains as steam did when they were young. You can't expect a steam level experience on a non-steam client. If you bought it on GoG for a special sale price, then I guess you get what you pay for.
Like it or not, digital distribution is the way of the future. Physical media is unfortunately going the way of tape decks, VHS and porn in playboy. Congrats on being 25 by the way.