Lumping all feminists (or all women) together is about as fair and reasonable as lumping all men together into a homogeneous group. I sure don’t know anyone who cheered for Lorena Bobbit or thinks it’s right to trick your husband around birth control use and I know a lot of women and a lot of feminist women. The fact that a few people might have done that hardly makes it a main stream feminist tenet.
There are plenty of crazy and selfish people to go around. Once again, are you more interested in venting and swimming around in your hurt or in actually making an impact for the better? Because if you care about helping to improve things, painting large swaths of humanity with a broad brush isn’t helpful.