As many people have said here, there can be people supposedly supporting a group that are completely ignorant to the facts. If you claim to be an unbiased and critical observer of feminism, first check out a few resources regarding feminism: note, some parts of feminism support men’s issues (e.g. hypermasculinity), LGBT issues, racism, etc. Women are a disadvantaged group due to institutionalized patriarchy. The result isn’t always blatant. This also affects many other groups and is why many feminists support other causes as well. Here is a good starting point if you’re interested. There is no harm in at least trying to understand the other perspective.