some of these are extremely concerning.
Some of the numbers are actually an improvement compared with a similar poll made 10 years ago, in 2014, and even another one made 20 years ago. For example, in 2014, just 41% rated the changes in society after 1974 as more positive than negative, and it's now at 56%; In 2014, just 25% were satisfied with democracy, and it's now at 57%.
More info here.
I assume this is influenced by Portugal being in an obviously worse state in 2014, when the sovereign debt crisis was the present and not the past. I am not sure if this fact is relieving or even more concerning, but I like to be an optimist.