I think the problem is that WoT is just huge. You have so many fractions: around 20 nations in the main continent, plus the Aiel (mentioned already a few times), the Saenchan (hinted this episode), a civilization that won't be seen till the end of the saga, the White Cloaks that you saw, several unaffiliated powers which are not really states, but could be very powerful (the Kin, the Windrunners), and then you have Aes Sedai with the 7 Ajahs, each one having a head (not known to anyone else outside of the Ajah) and three sitters. Then you have the politics within the Aes Sedai, that the more powerful in the power an Aes Sedai is, the more political power she has (both Siuan and Moiraine are in top 5). Then you have the equivalent of Aes Sedai from the civilizations outside of the continent (Aiel, Saenchan, Shara) with all the politics going there, etc etc. Then you have the Dark one minions, you have seen Trollocs and Fades, but there are many more, including the Forsaken which were already once mentioned.
The Fades definitely are not equivalent to Ringwraiths, they are far less powerful. The Forsaken on the other hand...
So, the world is just huge to be able to give a quick introduction. It is larger than both ASOIAF and LotR worlds.
And to be fair, in GoT it was done slowly too. In the first episodes, you only see the Baratheans, Starks, Daenerys and you know that the Queen is the daughter of some great Lord, but only near the end of the season, you realize how powerful is Tywin. Then you see Tyrells in season 2, the Dornishmen in season 4, the people of Free Cities in season 5 or so.
Saying that, the first season of GoT was much better than the first season of WoT. Though, that season is one of the best seasons in any TV show IMO. And it helped, by having more interesting source material, with WoT Season 1 being a copy of the Fellowship of the Ring. However, WoT diverges quickly after that and becomes something completely different to LotR and very interesting on its own.