Speaking from a long career in technology, I have observed exactly the opposite. The women I’ve worked with have been (in general) at least as competent, tough and hard working as their male counterparts. I have come across far more useless male co-workers than female ones, even accounting for the disparities in numbers.
In particular, in software development most female hires I've dealt with not only could not code at the level of their male counterparts, they could not even understand the constructs of their masculine peers without significant mentoring.
The relative numbers bear that out as well. For every Emmy Noether in the world, there are literally dozens of men with the same talent.