Do you not see how unfair it is to make assumptions about people before you learn about or understand them? Judging people before you know them is called prejudice. Does your prejudice and presumption know any bounds? 

There is lots of evidence to support allowing trans women to compete with other women. It isn't just being taken at their word they aren't as strong -- that was your assumption. It's also your assumption that cisgender women are all losing to trans women. The evidence says otherwise. The list goes on. 

There are also trans men along with trans women. So trying to call trans women "men" either shows your malice or ignorance. 

Maybe you should try to learn about the subject before you have a strong opinion? There are very real evidenced based reasons the Olympics, NCAA, and other sports organizations allow trans women AND men to compete. Shouldn't you try to understand them before you assume? 

Either way your false assumptions are easily disproved by the facts.