Not valuable if you were born later than the 80s

Rating: 4/10 (16 September 2017)

This movie was a huge disappointment for me, after how much everyone has been praising it, and after seeing its IMDb score. Now I understand that all this praise is only because the movie is SUPER old. I absolutely understand that seeing these special effects, visuals in 1968 and that and the following decade must have been completely overwhelming. I also understand that many movies, even Star Trek and Star Wars took inspiration from the shapes and solutions of this movie - the movie to the genre of sci-fi is like Iron Maiden to heavy metal.
Apart from this, I didn't only grow EXTREMELY bored while watching, actually at times I wanted to shout and I was punching the air because I was so nervous. Not nervous because not knowing what is going to happen and because the movie was interesting, no, not at all. There were several scenes, were NOTHING happened for 5-10 or even 15 minutes. I loved the beginning with the apes, but those extra long spaceship scenes made me go crazy. I was sitting and sitting and doing nothing and watching nothing. What was once a great technical achievement (like filming those rotating things) means nothing to me. Maybe (for sure) I am too young, and a 'spoilt' 90s 'kid', but I didn't find my enjoyment in this movie.
I spent all 160 minutes waiting for something to happen. I had no idea what was happening or where the story was leading, but keeping the high ratings in mind, I was expecting a huge plot twist at the end of the story, that would make me go 'oh my god', I was expecting a kind of mindfvck, like at Interstellar. Sure, a plot twist happened, and it was definitely unexpected, but didn't help me case, only made it worse. That room. What is that room? There, also everything was happening so damn slowly, and no dialogues... Sure, I read the explanations of what it is, but none of that was clear from the movie.
I really liked the creepiness of HAL though, and its/his? showing emotions towards the end.
This movie wasted my 2.5 hours, sorry! I guess I was born too late?