Wow that form is simply huge with masses of required fields - little wonder you are getting validation errors. I honestly doubt that anyone would be able to fill in that form without validation errors or be prepared to do so.
Nevertheless, to deal with your validation errors I would suggest you take just a very small section of your form and copy it into a separate form to test and solve the validation issues for that section. The errors are likely to be in the HTML and CF7 tags you are using in the Form section of the CF7 interface.
Once you've solved the issues for that section repeat the process for another small section.