Could you tell me what you are using and how satisfied are you with the service when it comes to speed?
Different VPNs have different pros and cons in terms of price, speed, server location, security, logs, payment methods, etc. Unfortunately there is no "Best VPN" or "one size fits all". You are going to have to spend at least a little while doing a bit of research to find out which one is best for you. If speed is your major concern then one of the bigger companies is probably your best bet, but be aware that many of them are based in Five or Nine Eyes countries.
I would highly recommend the following site:
https://thatoneprivacysite.net/vpn-section/There is also a much smaller and simpler list available here:
https://www.privacytools.io/#vpnAlso worth noting that many VPNs offer a several day free trial, or a money back guarantee within a week or so if you aren't satisfied.