The WORST movie you've ever seen? Come on There are quite a few low scoring reviews that say this is the "worst movie I've ever seen" or criticize the "poor effects." Honestly, I can't take you seriously, it sounds like you need to watch more movies.
I don't know when everyone became a scathing critic but I think this movie succeeds in exactly what it's trying to accomplish. They literally reference "Independence Day" in the promo for the movie. It is not trying to break new ground or blow your mind. I will admit it doesn't even rank among movies I need to watch more than once, but to tear it apart and examine it under a microscope is to not understand it.
"Netflix" isn't a standard anymore. They're acquiring other network shows left and right and producing as much original content as possible, why? So they have an exclusive catalog and more groups of people will have incentive to continue subscribing. Not everything they put out is going to be your bag, and certainly doesn't need to be compared to each other.
I love the kids in this movie, I think the acting is fine. I didn't see any issues with the effects and if that's your main criticism, maybe you haven't seen any older movies? The plot is nothing special but again, this movie is not someone's magnum opus and it's not trying to be. Everyone is entitled to their opinion but personally I think people need to start recognizing the difference between something objectively bad and something that's not targeted for them.