It's actually really interesting stuff, I've read some on it, and while a good bit of it is over my head, basically we are fortunate. Yes, we get major solar generated geo storms, and yes, they'd be a problem. However, the particle/proton side of it isn't enough to cause any long-term significant damage. Scientists have done work on understanding this by examining ice cores in Greenland and Antarctica.
In 80s there was a study done that initially indicated that particle energy and damage was detected, which has since been debunked. Conspiracy theorists, as they do, latched on to the study that indicates a coming apocalypse, while ignoring the fact that it's been debunked. The one in 1800s isn't the largest they've found and dated, the largest was about 8,000 years ago (from my memory, so maybe off a bit), and even that, while large, wouldn't have been big enough for long term damage.
However, we do know this does happen in other systems, and one of the major theories because of the nature of binary star systems and gravitational wobbles (this is where we seem to be fortunate). Our system is just big enough to be as it is, and just small enough to avoid enough mass from collecting at Jupiter to form a secondary star. All of that part is theoretical but very interesting.
That said, it's also not without precedent for technology to be lost to history after the destruction of a civilization, however the circumstances now make that seem unlikely. There was a civilization in Africa (I believe Ethiopia, but again, from memory) that actually had the modern equivalent of sanitary sewers and pluming about 5 thousand years ago. They used clay pipes, which we did as well prior to plastics. Historians/Archealogists aren't clear on what happened to them, but that technology was lost for a long time. So it can happen, but nowadays, it seems pretty unlikely given the amount of written information out there that something like this could happen.