You will get used to it. The game needs to have that change. In the past you were watching games on TVs with tubes and low resolution. With HD, Super HD and 4k at home you can see every offside mistake being made. It is just fair that the refs get the same benefit rather than being trashed and harassed for a preventable mistake.
In regards to level: There is a lot more money involved in the top leagues and international soccer than on the lower levels. Much more at stake. Or do have implemented goal line technology to the lower levels in soccer in the UK?