I'm not directing this at OP, as I can understand her health issues.
However, I do think that a lot of people expect instant gratification, instant customer service, instant everything right then and there when the issue is caused by an Act of God i.e. the weather in this case. And as for the rush to castigate Ryanair, well I am sure there were many airlines on their way to Perugia similarly affected. It is life, it is travel, it is weather events. A bit of patience would be useful, and I am sure many passengers understood the circumstances and waited for the coach to arrive, which it did.
I am not an employee of, nor do I have connections with Ryanair, but I would have waited around a bit to see what arrangements would be put in place. It could not possibly have been organised for the instant the plane landed in Pisa since that only happened because Bologna was affected and a further diversion was required.
A few years ago my RYR flight was cancelled due to ATC strike. We queued patiently to be sorted out, while others were going a bit doolally (no kids involved either, just a sense of entitlement and zero patience). When we reached the top of the queue we were called to a side office. We were told that our calmness and patience was noted, and we were given a 4* suite in a lovely hotel, a taxi to it and a taxi back to the airport. No coach for us! The stay was three days. Was brilliant!
I hope OP and the other passengers are now sorted, although Perugia does not look terribly inviting at the moment unfortunately.