I love aliens, but the franchise overall has been quite poorly handled with more misses than hits.But people wanted to associate the IP with failure, which just isn't true.
Alien - amazing, one of the GOATs
Aliens - incredible, one of the GOATs
Alien 3 - good, especially the "real" version, but not amazing
Alien Resurrection - start of the downfall, ok but not great
Alien vs Predator - not great
AVPR - not great
Prometheus - mixed bag, I personally loved it despite it's very big flaws
Covenant - dogshit terrible
Alien 3 on SNES was amazing, good on megadrive
AVP 1 and 2 on PC - amazing.
AVP on 360/PS3 - very good
Colonial Marines - terrible
Isolation - very good
The franchise overall could be considered a bit of a failure IMO because after the first 2 movies it has all been downhill basically. Nothing has even come close to matching them, and same with the games - they've just gotten worse and worse basically with the odd exception.