I have watched many videos and read many articles and it says that a particle is acting like a wave. So why we try to understand on which hole the particle went through?
Clearly a wave will pass in both slits and that's why we get the stripped pattern.
A short (not extended) theory would be:
Each particle contains informations of the whole object. So a light that passes through 2 slits contains particles that are related to each other.
In the same way we people, are made from particles, and each of them contains informations and is connected with each other, that's why me is me and you are you.
So if all my particles passes through those slits in the end will produce me. But if your particles passes through those slits will produce you and not me. So it makes sense that those particles contains information about the whole object and are connected to each other.
Similarly is pre-defined that the the light will produce a stripped pattern therefore each particle is a wave but it contains informations about the whole object and is connected with other particles of that object.
So what is weird about quantum mechanics?