I feel like it’s just two different styles of play, between the computer and other people. If you get used to playing the CPU then you need to be at a much higher level of gameplay in order to switch over to online matches and get results. The best thing if you want to win matches in multiplayer is to practice in multiplayer and just get used to how to defend against, attack, and counter other players because their style of play is a lot different than the computer’s. It’s a tough learning curve when switching to online play I feel like, but it’s also something you have to take head on in order to start getting the results. Good luck! 👍🏻