At risk of derailing (sorry if I am), my mother, like many people at the time, lost her job immediately and struggled, for a long time, to find a new one due to her age and the fact she was a parent.
I don't think, for many people, it was the loss of systems as such, although if that's all you've ever known, then readjustment would have been difficult. It was the huge economic impact of the reunion that had an impact that it still felt to this day.
My History teacher used to tell us about 100% employment in the Soviet Union. Everyone had a job, even if it was a pointless one, and therefore everyone had money, even if it was only a little. Most ordinary folk had the same flats, furniture, opportunities for travel around the SU. There was little variety in terms of food (with a lot of black market trading), everyone who drove, drove the same type of car - a Trabandt.
When the reuinion happened, along with it came capitalism. People lost their jobs, their old money was worth a lot less, inequality rose, there was more choice of goods and suddenly everyone had different things and different opportunities. The East needed to be modernised and the West resented paying for it. Yes, there was more freedom, including freedom of thought, and you were no longer prosecuted for holding the wrong ideals or not conforming. Pensions were still unequal between the East and the West for the same jobs when I last visited in around 2010.
The feeling of inequality remains, from everything I hear from my remaining few family members. The West is seen as arrogant by the East, while the West perceives the East as dumb and fascist. It doesn't excuse, but at least explain, why there are many more East Germans showing sympathy to right-wing parties.