I'm not trying to underplay the Libyan situation at all, but do you have any evidence that it's worse than Syria?
They both started in 2011. The Syrian conflict maybe winding down, but has started a new phase (in Syrian Kurdistan).
Syria had slave markets too.
The UNHCR data[1][2] shows a lot more refugees from Syria than Libya (don't forget Libya is often used by refugees from other parts of Africa as their outgoing port to Europe, so news reports on refugees arrivals from Libya don't mean the refugees were Libyan).
One source on the Wikipedia article claimed 1/3 of the Libyan population had fled to Tunisia. This seems non-credible: Neither Tunisia nor any refugee agency makes this claim. [3] claims "there are 2 two million Libyans abroad, mostly in Tunisia", but this is still less than half the number of Syrian refugees (over 5 million) and less than the number of registered in Turkey alone (over 3 million).
I think your "That's because reporters (justifiably) fear to go there" statement is also unfounded - in Syria journalists were targets of both ISIS and the Syrian state, and frequently murdered by either of them.
[1] https://data2.unhcr.org/en/situations/syria
[2] https://data2.unhcr.org/en/country/lby
[3] https://www.brookings.edu/blog/future-development/2015/03/17...