No free speech is not a right. Freedom of speech without prosecution from the government is a right.
No one is required to platform your stupid fucking viewpoint.
The 1st amendment ONLY allows you to say what you like and not have the government prosecute you for it. However, there are still limits to speech that cannot be prosecuted.
For example, you can’t yell fire in a crowded theater. You can’t cause a mass panic that results in injuries or death.
A private company has exactly zero obligation to platform your idiotic ramblings.