it's the fact that the eu law dictates law
Yes it would be unsettling for some if the EU dictated all our law. It wold be equally worrying for say Spain if we had been dictating all theirs. I can see it worries people but it helps to dig deeper and look at which areas are shared and the mechanisms in place. We agreed to jointly pool regulations in limited areas that we retained a joint say in.
Responsibility for the vast majority of decisions and laws is held by national governments. The UK jointly agreed that we would all set bare minimum rules about the environment, food, agriculture and some workers rights. We got to say how these would work in other countries eg France, Italy, Germany too.
All national governments ( ours included) have complete autonomy over most things: elections, health, education, defence, policing, crime and punishment, social care, elderly care, pensions, fiscal policy, individual taxation, non EU migration, local government, property law etc.
Ironically, under the current Brexit plan we are obviously no longer participating in making the EU bare minimum rules, but will still abide by them for the sake of trade. But it's still only in limited areas -mostly food and environment so perhaps doesn't matter that it's no longer as joint as it was.