I see some people say that using VPN can improve internet speed but I don't think that's true and in my experience most of the time using VPN makes my internet slower.
I think you may feel an improvement if your ISP uses a terrible DNS by default, or the websites you accessed have something against IPs from your nation, etc. But yeah in general the trade-off is speed, which shouldn't be that high if you use a decent VPN. At least that's how it is based on my experience, including accessing casino websites.But I don't think they offer free service?
They do but they lack a lot of features[1]. It's probably worth as a trial to see if paying is worth it or not though, although you can't really tell if using different servers will affect your speed or not afaik.I downloaded and installed proton VPN to try it out. They offer free plan for all users but there are too many limitations, they just let me connect to 1 random server, I can't choose the server I like. This is quite inconvenient for any user, even regular users, as there are too many limitations compared to other free VPNs. But I think using proton service is safer than other completely free VPNs.
Hope it works for you. I wonder if you're using a terrible VPN provider though.
As far as I know Nord VPN offers a lot of servers and is considered as the VPN service that offers the most variety of servers but I think if you are more concerned about privacy and security then I think Mullvad VPN is a better choice with open source.
https://www.privacyguides.org/en/vpn/#mullvad