Awww, it reminded me of Serbia, I once spent about 3 hours to cross the border from Serbia to Romania, but unfortunately nothing has changed regarding this border today because Serbia is not in the EU.
And yes, I hope that from now on crossing the border between Romania and Hungary will be a pleasure, in the rest of the EU I have never encountered queues through customs, in fact between some countries I didn't even realize when I crossed from one to another, hehe.
I wish you good luck in visiting as many of Romania's amazing places as possible.
Have a wonderful weekend.