I too must agree with PPRuNe Radar, and add some futher ideas about fostering the right approach among your fellow crew and we ATC folk. Note that, as I type this, I'm thinking generally in terms of you addressing other crew...
Remember we're on the same team and thus have the same goal: move airplanes as safely and effeciently as is humanly possible. Anyone who says otherwise is a damned fool.
I'd strongly suggest repeated visits to your local ATC units (and non-local when you're elsewhere on the planet). Ask questions and don't feel stupid doing so--there's no reason in the world that you would be expected to understand the subtleties of what's going on there before you ask. Know that when you look at a RADAR display you're going to be disoriented at first. That's how we feel when we visit a different facility for the first time, and when we're on the flight deck. It's the nature of the beast. And it's pretty endearing to have an airline captain come in trying honestly to learn (and teach!).
Make a friend or two at those local ATC units. When you encounter other crew who have a certain disdain for ATC, take the other crew over to meet your friend and see the facility. Air the issues as completely as possible.
You're the customer and you are entitled to fair and unbiased treatment. However, we're just humans (except for Jerricho). Some are more customer-biased, some are less. Some are short-tempered, some are consistently calm and considered. Like you, we all have bad days (and I'd just like to add here that just because I vectored you ACCROSS the localizer on a windless day with no other traffic on frequency doesn't mean I'm an idiot. No sir.). In short, try to give us a break when we screw up and encourage others to do so. We'll try to return the favor.
Don't get into an argument with us on frequency (see previous paragraph under "short temper" and/or "bad day"). However, don't let your anger about a situation eat a hole in you either. Calmly ask for the faciltiy phone number and use it when you get on the ground. Remember, you don't have to make a forceful case because the recording can make it for you. See it through, and if you're in the right, be gracious and let it go. If you're in the wrong, be gracious and let it go. If poop needs to hit the fan it will regardless of what you do.
Tell you what: I'll continue to foster a spirit of helpfulness and open communication down here, and you do the same up there. I sincerely wish you the best in this new phase of your career.
Dave