I agree with what you said for the most part, except the fact that I wouldn’t define sexism in the majority of cases having people “stealing” your ideas, nor shooting down ideas.
In the first case it seems a common practice in competitive environments, where workers have no incentive at all to cooperate and all the incentive to screw each other to look better and chase promotions. I think people who do that regularly do that with everyone. Appropriating ideas and work of others is how middle managers in many cases got there and how they climb the ladder, even though everyone knows what they are worth.
The second is an extremely common occurrence in tech, ideas are shot down all the time. I have seen it occurring countless of times, I don’t think is a sexist practice inherently, although still something extremely annoying within tech. It is sexism when ideas are shot down “because a woman is saying it”, though.
My final remark is about the part about “males getting raises without even asking” (paraphrasing). Now, this may have been true in your context, I have no way to dispute it. However, I just want to reinforce that the narrative of “males being somewhat on the same side” disregarding the conflict within workers and owners (I.e. those who get the raises and those who give them) seems to be completely fabricated (based on my experience) and also extremely damaging to workers solidarity. The narrative that somehow gender prevails over class as a factor of unification is very dangerous and plays right in the hand of those who benefit from gender conflict as an obstacle for class unity.