slow uploading

Hello @teclal

thank you for your inquiry and I am happy to assist you with this.
I just want to confirm that you are talking about the loading time (Not uploading) of your website?
From the user experience perspective, I am not seeing any issues with your website. the website loads fast and browsing through the pages is also fast and responsive As Per the Gtmetrix report, the only thing that you should concentrate on is optimizing your images, so you should install some image optimization plugin like Ewww Image optimization or SMushit (both are very good solutions.)
You also have a lot of external resources that are taking some time loading on your website and that’s why the score loading time is 6.9s when test is performed:
https://www.gstatic.com/recaptcha/releases/iSHzt4kCrNgSxGUYDFqaZAL9/recaptcha__en.js `(296.5KiB)
https://www.gstatic.com/recaptcha/releases/iSHzt4kCrNgSxGUYDFqaZAL9/recaptcha__en.js (296.5KiB)
https://wubook.net/js/wblib.jgz (244.3KiB)
https://www.google.com/recaptcha/api.js?onload=wpformsRecaptchaLoad&render=explicit (453B)
https://www.golfhotelmilano.com/wp-content/cache/minify/47ee7.js?x38639 (177B)
https://www.google.com/recaptcha/api2/anchor?ar=1&k=6LcSfbIZAAAAAJiU9dyH9d63OIwCEalypJTlmOso&co=aHR0cHM6Ly93d3cuZ29sZmhvdGVsbWlsYW5vLmNvbTo0NDM.&hl=en&v=iSHzt4kCrNgSxGUYDFqaZAL9&size=invisible&cb=n38flnbk8qqb (45B of inline JavaScript)
https://www.google.com/recaptcha/api2/bframe?hl=en&v=iSHzt4kCrNgSxGUYDFqaZAL9&k=6LcSfbIZAAAAAJiU9dyH9d63OIwCEalypJTlmOso&cb=sp2xzd6fx4nl (44B of inline JavaScript)`
To sum up, your website is not extremely slow and you should concentrate on optimizing the images to reduce the page size.
Thanks!