1. In almost every democratic country there is a court which can strike down laws. This is part of democracy. The judges are chosen by a committee that includes members of both the government and the opposition. It is, in fact, number 30 on the Democracy Index sandwiched in between France and Belgium (it fell in the civil liberties category, probably because of the connection between government and religion and especially the fact that there is no civil marriage), not far behind the US and ahead of Italy and the Czech Republic.
2. Security forces are supposed to use violence. See Rashi on שוטרים. What do you think they should do? Say “Please accompany me to the police station so that I can fill out the arrest form”.
3. You are greatly exaggerating the extent of corruption in Israel. This is a grievous sin. The fact of the matter is that nobody knows how corrupt a country rally is. There is only perceived corruption. However, this is can be lower or higher than actual corruption. A bureaucracy can succeed in covering up its corruption or a people can be very critical by nature. It also depends on how one defines corruption. For example, one of the indices in the Perceived Corruption Index is “ease of doing business”. Most would not consider regulation to be corrupt.
4. Actually the average salary in Israel is comparable to that of the US. Most Israelis are affluent to the point where foreign vacations are (unfortunately) common. Israel is actually only number 19 on the list of most expensive countries. It is, however, close to the happiest country. It is among the top 20 on the UN’s Human Development Index.