Alien may have technical flaws, according to your understanding of what the best way to build a deep-space going cargo ship would be, but that doesn't mean the film is 'poorly directed'. In actual fact, the film is astonishingly well-directed, nigh-on perfectly paced, and totally brilliant in nearly every way that counts. Sure, there's a big room with dangling chains and dripping water (er, leaky pipes in a spaceship...?), but that has nothing to do with its effectiveness as an edge-of-your-seat monster-in-the-house movie.
And if Alien is good, then Aliens is basically perfect.
Matrix... blah blah ...Who would design such a system?
Well, robots that care nothing for their human underlings, of course.
A society that has airbag, seatbelts, child protective caps designs a V/R system without die in V/R protection? Really?
The robots designed the Matrix system, not the humans. I don't think the robots bothered with airbags. I'm not defending The Matrix, I think it's a fairly silly film, but your criticisms don't make sense.