How much hair does everyone lose when they wash it?

It seems like I lose more hair than usual every time I wash it.

I have a question! How much hair does everyone lose when they wash it once?

My drain gets clogged every time and the water won't go down, so it gets completely blocked. Is this normal?

My hair is a bit long, but even so, it feels like my fur is being pulled out when I wash and dry it.

I am curious about what others think.