Get gun powder barrels, blow them up... this option is in the game.
The scuttle mechanic is to admit defeat, it is not a weapon.
Also, a solo player can usually be a real nuisance even when losing. I have sailed off, blew up etc. with the spawn campers ships by just jumping overboard... be creative there are more options available to you and some even will bring you to victory.
Being boarded has to do with:
- Not noticing a pirate approaching, so you can turn or be prepared.
- Not guarding your ladder.
- Being anchored, which should never be longer than the time it takes to lower it, raise sails and raise it. Being able to move is vital for solos.
