'Brussels' has so agenda. Nothing is decided without agreement from the Council of Ministers or the European Parliament.
But there's 28 member states, of which Britain is just one. We get outvoted all the time because our goals and interests are different from mainland Europe. Now that the power of veto has been stripped from most decisions, it's even worse for us.
What, you actually think that Britain should have the power of veto over the EU? Nothing would get done. The point of the EU was supposed to be economic cooperation between European nations, not "Britain get's to do what it wants but the rest of us have to follow the rules". It's a democracy, things don't always go your way (*hint* the new government).
Of course, there are other things that come along with it, like human rights and food quality control, which personally I'm glad are in place.
The Tories want to repeal the human rights section, which is pretty fucking atrocious, all things considered. If they want to make their own extra human rights, just add some now, don't repeal the old one and make a new one. It leaves huge scope for loopholes (probably to do with terrorism/monitoring communication I'd imagine) and abuse. I honestly see no reason to take away any human rights, only add new ones.
Honestly the next 5 years are going to be shit for average Britons. The NHS is going to be overworked and under financed, with more profits being handed out to private companies (and with the TTIP, the NHS will be vulnerable to law suits if it doesn't allow companies to take over a portion of the market), more people will lose benefits and community centres will close, and all this simply to cut costs for companies to attract them to the UK.