Stopping people having fun doesn't have anything to do with plastics. So that's a weird argument to have.
Just put a return value on plastic. Have governments pay out for plastics returned to them. £20 a kilo? £200 a kilo? At some point it you can make it worth while taking a ship to sea and fishing plastic out to make money.
Where does the government get the money to pay for plastic recycling? Tax the plastic producers.
There are solutions to most of our problems, it's us not voting in a government that will address these issues.