It goes back to 'bribery and corruption.'
Many moons ago the government put out a contract to build the new domestic terminal at Lagos Airport (Murtala Muhammed, DNMM). Following that the action became confused. The winner became the loser and the new winner didn't seem to have the actual resources to build much of anything so that (correct me if I am wrong in this) the former domestic ramp is still blocked off, covered in little piles of dirt that have been there so long now they have bushes growing on them and there are medium-size jet aircraft that just park where they feel like it, such as on the active taxiway.
As if that were not enough, the eastern link for Runway 18 Left was not rated for the size of aircraft that use it, so that it develops the most amazing damage; the pavement sinks and swells in a way I have never seen anywhere else. This often lends a certain Paris-Dakar air to what should be the boring act of taxying a large aircraft.
Add to that the lack of much in the way of markings, signage and lighting, plus lots of tall lighting masts dotting the overcrowded ramp and you have a real obstacle course.
These guys you are slagging off were probably just trying to operate to local standards and got it badly wrong. Come try it yourself and see how you get on. 'Not very well' would be my guess!