There are many Great Brexit Benefits.
• The replacement of the EU's unethical and environmentally destructive CAP with a new system of subsidies for farmers who improve animal welfare and who protect the environment.
• The end of EU FoM which led to discriminatory priority for Europeans over Non-Europeans. It has been replaced with a meritocratic migration policy which treats all world migrants fairly on a basis of equality of opportunity for all, regardless of their nationality (it also allows the UK to turn away EU criminals the EU wouldn't allow us to turn away).
• The end of EU SM which prevented the UK from banning unethical trades, resulting in the UK being the first European country to ban cruel live animal exports, and the first country in the world to ban the shark fin trade, with major steps forward towards bans on foie gras and fur imports.
• The introduction of Gene Editing (different to GM) which can eradicate disease and suffering in agriculture, benefit the environment, while increasing UK productivity.
• UK control of VAT allowing 0% on energy saving measures such as insulation, draught stripping, various heat pumps, wind turbines, water turbines, solar panels, etc. Much of this wouldn't have been possible under EU rules. The EU has previously blocked the UK from such measures. Although the EU has now followed the UK's lead on solar panels.
• Brexit driven wage increases, with wages up 18% across hospitality and catering and wages up 10% across retail. A great benefit for many British workers.
• The UKs independent vaccine programme. While this could technically have happened within the EU, Remainer MPs (including the Labour Shadow Cabinet) were openly against it. So, if we had voted to remain and left Remainers in charge, it wouldn't have happened.
• Increased sovereignty. Supremacy of EU Law and EU QMV allows the EU to pass laws even if EU States are against those laws. EU members are therefore not sovereign.
• Escape from the EU's democratic deficit. The EU's Executive Power holds all legislative initiative, yet faces no democratic public elections and can't even be removed by the European Parliament with anything less than a two thirds majority.
• End of EU CFP which restricted the UK Blue Belt Conservation Zone. The UK Government is introducing new Highly Protected Marine Areas (HPMAs) which maintain the strictest possible environmental protection, with a ban on all fishing, construction, etc. These can now be anywhere throughout the UK EEZ (thanks to Brexit).
• Ban on stun fishing throughout UK EEZ half a year before the EU.
• The EU has agreed to surrender 25% of its quota in British waters over five years, with 15% already surrendered in 2021 alone. After the five year period, the UK can reclaim 100% of the quota in British waters (although they will likely allow some continued access for the EU).
• Ban on destructive trawling of seabeds (and other damaging trawling practices) in several, pre-existing and significant UK Marine Protected Areas (MPAs). This was previously prevented by the EU CFP.
• Successfully signing trade deals around the world. The UK has secured all the trade deals it had via the EU, now without the billions of pounds per year in membership fees it previously paid the EU to access them. The UK has improved on trade deals the EU has with Japan and Singapore by securing important provisions on data and digital. The UK has secured trade deals with New Zealand and Australia (which the EU doesn't have). A trade deal with India is predicted to be finalized by the end of the year. The UK had reached the final phase of its accession process to the CPTPP.