That's a pretty sad start. You normally don't even get that many neighbours and you have a late-game civ. Honestly no shame in going next imo, but you can still play the game out as a learning experience.
Edit: Upon closer inspection, your 4th is in really awkward spot. You really have seen this coming. If you are really out of acceptabld settles, consider going to war yourself with an AI buddy. Tradition is pretty good for early war.
Pangaea Immortal Standard Size as Germany. Roll China, Mongolia, Rome, Persia, Huns, Zulu, And Morocco in this game. Huns just pounced on my 3rd settlement with 3 catapults and 3 other units and Rome declared too. Might be a gg kinda game.
All of you are wrong. The worst is Hiawatha. That bastard forward settles you so hard that you're actually sideward settled, backward settled, and upward settled just to really push the point in. Then when you declare war because suddenly he's in your living room, chatting with your mum, and dating your girlfriend, and everyone else thinks you're the bad guy?
I sometimes just quit games outright if I have Hiawatha as an early neighbour. It's not worth it. I can start a new life, under a new name, in a new continent. Maybe be a fisherman or something. Maybe this time he won't find me.
Why would you ban Polynesia? Kamehameha is a bro, he's always a reliable friend. Don't mess with him and he won't mess with you.
The main reason I hate Hiawatha is that forward settling doesn't carry a diplomatic penalty in Civ V. If you played like the Hiawatha AI in a multiplayer game, everyone would hate you for overencroaching and you'd be the target of an early coalition and removed from the game. You just can't be that aggressive with your settling towards multiple Civs. In game, the other Civ AIs are like "huh, Hiawatha planted a Settler 4 tiles from your capital? Legit, that was totally his territory, you're a monster for declaring war". They see it as bad when you defend your natural zone of influence. I can't stand it when Hiawatha plants a city sometimes literally inside my Empire and everyone else judges me for removing it. It's the absolute worst thing ever, makes my blood boil. At least you know where you stand with Shaka and Monty - we'll go to war, there's a degree of mutual understanding, honour between soldiers.
Hiawatha's AI is like the definition of passive aggressive.