It really is better in single player. You get to keep the world after the owner gets bored and plays New World or some other weird game. If the server is dedicated odds are nobody plays. You get to set your own goals and challenges, and achieve them without somebody else throwing black metal weapons and lox pie at you for "help". Only time people group up in a server is because they don't care about the gameplay, they just want to socialise and goof around like it's gmod, and just build stuff.