Golden apples would not be a problem if you break their armor. Focus on that first then you can kill them quite easily!
There's nothing stopping YOU from buying stacks upon stacks too. If they wish to spend their gold that way good for them, invest in TNT and shred their armor.
We like playing games where we dont have to spend 10 miniutes spamming at armour or spending 30 miniutes collecting stacks of TNT. Plus people but extra armour basic
On the topic of a Good team, no matter how good you are you will get dropped, just cause they have a fully coordinated team. The least you could do there is just leave the game, or just make it longer. What I usually do when people like these show up is intentionally prolong the game, and the more longer it gets the more they lose their sanity. Finally they start calling "Stop hiding nqqb" or stuff like that.
No matter how coordinated a team is , they can still be outsmarted . I dont PvP people whoare good I run away and shoot and Blow bombs and tp around the map necause pvp is not worth it
If yo don't have anyone to play with, I suggest you play smaller maps like forest or storm, where each team is 2 players or just play solo. Keep increasing your party based on the good players you come across and then take to maps such as Teaparty or maybe even the Halloween map,rome or mansion.