That is my general feeling as well, and I happen to know two or three things about it, too. 🙂
I've seen experienced people in tears who had to switch from LX- to LH IT products.

It comes to the point that I now question if LH IT is working for LH or against it.
Of course that sounds like just another stupid conspiracy theory, which I'm not a fan of, but just looking at it neutrally, their achievement over the last 10 years is really very, very poor.

On the other side, what I could do 40 (!) years ago to access the systems and my reservations via a 300 baud telephone modem in good old PARS and DCS was a lot better in many ways than what I can do now.
Yes, that was of course not a public access then, and now it is, but the lack of functionality and reliability now and the absence of tangible progress is incredibly poor.