I guess the market for budget guitars is much bigger than for premium guitars. If I look at the electric guitar playing demographic, there are a lot of young players in their teens & early 20s that predominantly listen to heavy music. ESP are a brand i'd associate with heavy music. Ergo, ESP's bread & butter now appears to be selling budget Korean guitars to teenage metallers.
Beyond that, musical tastes & ears mature & you start looking for a more musical guitar with the money you now have. I've not played an ESP yet that has that vibrant, musical resonance to it that I get from some premium guitars. Especially guitars with less paint & finish.
As far as their premium guitars are concerned, ESP seem to have lost their way a little. The cost of an MIJ ESP standard used to be very reasonable. So reasonable, that I don't understand how they sold so many 1000 series LTD guitars.
Around the current price point of an ESP EII, you can get an awesome Ibanez or Caparison, both of which are superior in build quality imo & have natural finish options. Not to take anything away from ESPs guitars which aesthetically are fantastic, I don't think they play or sound as good as some of their competitors. I am an ambassador of the ESP Horizon with the pointy headstock. I still consider it one of the best looking superstrats on the market, but it was only once I started playing on PRS, Ibanez & caparison guitars & later invested in my Suhr that I realised how clinical the ESP was.