What makes Israel difficult are the internal conflicts. Ashkenazi versus  Sephardi. Religious versus secular, etc. These conflicts are not intellectual but play themselves out on the ground level. Any one of one group that ventures into an area of the other group is guaranteed to find himself the focus of lots of attention and effort to get rid of him. These efforts are sometimes simple shunning of lack of being helpful. Sometimes these efforts are less veiled and amount to downright sabotage of one's welling place or actual physical violence.
Then on the other hand there are the occasional do good-ers who realize that this kind of thing often results in throwing out the wrong kind of people-people that in fact would be good to have around.

[This is not to say that sometimes it is  a good idea to get rid of criminal elements.]

The result of all this is often when one is making "Aliya" he finds himself in an unexpected situation where people he thought were his friends [and in fact when they came to the USA to collect money always presented themselves as his best friends] turn out to be his most bitter and determined enemies.
[It is hard to know what to make of all this. The nicest period I had was when I was invited to join Rav Ernster. He had been offered by the State of Israel a set of buildings --on condition he could fill them. So I was invited to live there and join the learning group. That was a really glorious seven years. Later attempts to make it there fell flat and were somewhat disastrous also. I was a loner and people made it clear in short order that I was not wanted.]

Outside of the great Ponoviz yeshiva  and maybe  few other places like the Yeshiva of the Gra of Rav Silverman, the main problem in Israelis simple. The religious are insane. I mean literally insane.

Of course just being insane as long as one does not harm others is not so terrible. The trouble is the religious do as much harm as they can.