i am in the technology field and i have equal proportion of both genders in my work place
That's great for your workplace, but it is not representative of the wider world. Women occupy only around 25% of computing jobs. At Google, women hold only 17% of their tech jobs. At Facebook, 15%. At Twitter, 10%.
and i never found any sexism in this forum in my time here
Did you even read this thread? There are multiple comments saying women are too stupid to understand crypto and they are only interested in make up and baking. What is that if not sexism?