It seems that a majority of fishermen voted for Brexit in the belief that they would be freed from the constraints of the EU common fisheries policy. Britain would become a sovereign coastal state which would be free to do as it liked and british fishermen would be able to obtain the lion's share of fish caught in British coastal waters. It now seems that they feel they have been sold down the river.
You were warned what would happen by the remain campaign and it is no use complaining if you voted for Brexit. Sovereignty does not work the way you wish it to. Every country in the world including the US has to compromise on sovereignty when they join organisations such as NATO, The WTO and the UN. The US is obliged to send its daughters and sons into death or danger to protect Latvia if it is attacked. The UK is a member of NATO and must do the same. The UK and the US pool their sovereignty for the greater good. Brexiters have never really understood this. They have thought ideologically. They have decided to leave the EU simply because they do not like their fellow Europeans from having any say in British affairs. They also voted to leave the EU because they resented Romanian and Bulgarians being allowed to come to Britain "freely" to pick strawberries.
The Fishermen, are now confronted with the "realpolitik" of international relations as all their hopes and dreams have been dashed.To get a poor trade deal for the rest of the UK their dreams had to be sacrificed, and they have probably ended up in a worse position than before we left the EU. Their fellow citizens by a small majority voted for this.
Britain cannot afford to be totally sovereign and soon we will hear other complaints. British companies will now be forced to fill in mountains of paperwork to export to the EU and this will increase the price of their products on the EU market - our biggest one. There will be delays to exports and this will increase prices. Britain will become a less attractive place to invest in for institutional investors. Young people won't be able to get temporary jobs in Europe. EU students will be reluctant to come to British universities because of visa requirements and extra costs and this will affect revenues. There will be queues at the borders for British people to travel to Europe. British businessmen and women will be denied seats on the boards of EU companies unless they have a visa. The problems will be endless.
There will be an EU border down the Irish Sea. Would the US allow an EU border between New York and New Jersey states? A weakened Britain has no choice but to accept the humiliation of giving away its sovereignty. The EU and the US forced us to do this to ensure peace in Ireland. The EU-UK Withdrawal Agreement and Trade Deals offered you a Turbot but you got a Sand Eel which is about to go rotten. Don't complain if you voted for it, this is the price you pay for an imaginary absolute sovereignty.