When I tried stream max to connect plus servers of usa it is not streaming well reducing speed streaming on low quality but it is working on prime video streaming smoothly. Please look into that and make sure to solve the issue
What platform are you streaming Max on exactly?
Are you streaming the service through a browser, or using the official app?
Which specific servers have you connected to (e.g. US-NY#115)?
Are you using any other VPN, proxy, or custom DNS services/settings?
Please reach out to us at https://protonvpn.com/support-form with some answers to the questions above so we can assist you further.
Using in both laptop and smartphone US-MA#67 I used for but you take any usa server it gives low quality streaming only in max other streaming services like prime video is giving best streaming and answer for your question not using any custom dns or other vpn or proxy because i trust proton vpn