I have a right to speak, according to the First Amendment, and a right to post on FR, if I follow the rules.
If FR exists only to cheerlead the Republican Party, then it's declined a long, long way since the old days.
No one has challenged your right to speak although speaking here is up to the folks who own this website. That is true for all of us.
FR is doing just fine. There are still plenty of discontents buzzing around but there are a lot more good conservatives with common sense and that's what keeps it healthy.