Sea of Thieves is a five star game that is ruined by its toxic player base. Everything about the game is excellent except for the PVP aspect. Many fun gaming sessions have been ruined by PVP players who will relentless pursue and sink you every time you respawn to the point where you can't even play the game.
If another player ship sinks you and takes all your stuff you will not respawn with enough cannonballs to fight them to get anything back. If you spawn at an outpost that you have already bought cannon balls from you can't buy more. You are vulnerable while you try to rebuild your supplies and during this time the other players will find you and sink you again. The current game play design rewards players for this kind of toxic behavior.
I would not recommend parents allow their children to play this game. There is voice chat and with that comes a lot of hate speech, swearing and other language not appropriate for children. The developers require video evidence to report these people so they rarely get removed from the game.
The game would be a perfect 5 stars if the developers made PVE only servers. I would be willing to pay a monthly subscription for access to a PVE only server so my friends and I could actually do the adventures.