Don't blame the EU, they wanted to get Brexit over with ASAP. Their current attitude judging off the commission is fear, not of UK leaving, but of keeping the EU alive. Certainly Brexit adds to that fear, but it is not the sole root. Currently the Italian Bank crisis, Eurozone crisis, French econcrisis, Migrant crisis and isiscrisis is going to leave their hands full without even considering the eurosceptics that have been taking over nations in yurop past few years. Particularly of issue is that with the UK leaving, the EU loses one of the wealthiest nations most committed to EU reform, so overcoming bureaucratic deadlock to appease soft eurosceptics will be all the more difficult
So yeah don't blame the EU, they got their plate full and they can't do anything until article 50 is invoked and the process legally starts. It's gonna start soon, at which point everyone expects the EU to finalize everything asap
I don't know where you or unspecified others get the belief that the EU is giving the UK VIP red carpet treatment, it's quite impossible for them to do so. If the UK gets red carpet treatment and leaves, it invalidates the purpose of the EU, as the UK would get every benefit for no obligation or loss of sovereignty; this would encourage every yuro nation to seek such an agreement and would kill the european superstate project ded
Calling this their "current attitude" also seems to belie that the EU has been pretty consistent on their beliefs and attitudes, the only thing that has changed is the attitudes of leaders of national democracies, which represent their countries and not the EU