no idea what "social networks" you read your news, but all the problems you point aren't really anything different from the last 40 years and mostly not a problem.
migrants, all countries in Europe had immigrants and emigrants indifferent times in the last century. Sure, countries with colonies had higher influx of migrants, that is the price to pay to promote trade and travel between old colonies. Either way, most migrants are welcome, they do jobs that the locals do not want anymore. long term migrants get promoted and rise in society. Most work hard and well. Sure, some places can get a bit migrant overflow, not even external migrants, inside the same country you also have migrants and they all tend to go to the biggest cities. that always cause problems but is not just because international migrants.
Losing free speech, no idea what you are talking about, we can say whatever we want... sure, we should not burn a Koran or Bible, it is called self control and respect by others, but most place do not forbid it. Most that did that is to try to control provocations by radical right wind people
The very fact that we can read the trash that is incoming from the USA social networks prove we have freedom... most people know how horrible most of it is, but hey, we also have some that believe it and that is how some radical right wind politics are rising popularity.
anyway, just because Europe try to do good things, we must be all communist, right?!
luckily we life much better in our side of the pound than people on the other side, we have most of privacy protected, we have healthy and real food, our environment is much better, we life happier, we have much less crime and very little gun incidents, little racial problems (except when again radical right wind people show up) and even our poor aren't as poor as others
So learn how to read other news sources, you may learn a little more outside your closet