Yeah, sorry.
It just really pushes my buttons, y'know? OD&D's psionics were fascinating when I first read them, if confusing, so I went to see how AD&D handled it. AD&D did a pretty good job with converting most of the OD&D material, you know? How much worse could it be?
Good God, how much worse could it be?
All the fun little bits I liked about OD&D's psionics? Gone. The only thing really remaining in something close to its original form is the psionic combat, but it's burdened by the ridiculous "one attack every segment" rule and also has a bunch of small annoying tweaks like making it easier to brain-fry non-psionics (moving the required Psionic Attack Strength from 120 to 100) and, well, randomizing which psionic attack/defense modes you end up with.
The OD&D ones scale with the number of powers you know, see, so if you're a newbie you can only Psionic Blast while a master could use Psychic Crush to kill people outright (not to mention defend themselves and all their buddies with Tower of Iron Will).
AD&D? Nope, you know a random number of them at character generation and IIRC never get any more. Choose whichever ones you want, I guess.
And then the powers! Good god, the powers! OD&D's pretty neat in how it divides things up so that each class has its own little list of available things, so the kung-fu monk "mind over body" shit goes to the Fighter rather than the Magic-User. AD&D? Nah bro, let's just put it all in one big pool and see what happens.
Similarly, that little note about how, when you as a DM are making the random tables, you should make it so that they're more likely to get stuff that's related to powers they already have? Nope, one big pool.
And all those neat little flavorfull class-specific drawbacks to psionic power are gone, of course - the magic-user doesn't lose spells, etc.
Man, I get that Gygax didn't like the system and only included it because of peer pressure, but why did he have to fuck it up so thoroughly?