I think you should stick with it just a little while longer. And soon you will be able to "eye-ball" a tablespoon or a cup of cereal. I use this trick all the time when I eat out.
There are also methods of measuring meat, cheese, crackers with the palm on your hand.
http://weightloss.about.com/library/blmeasure.htm That way you can measure without feeling like a ball and chain to your measuring tools.
I HATED measuring out everything when I first started - but now I love it. I know exactly how much I am eating and how many calories I am having so it takes the guessing game out of it. And if I end up not loosing one week I can look back into my food journal when I was loosing weight and see exactly what was working for me.
Also I think that joining TheDailyPlate.com would help. You can add your foods into it's database, press "I ate that today" and it will add your calories for you so it is always on your computer and you don't have to do the math!
Sometimes I am even awed at the fact I can eat the things I love within reason because I measure them. Light sour cream, bbq sauce, cheese, meats...measuring as totally been a blessing for me.
I know that people can lose weight without measuring or counting calories and is measuring and counting is not for you and making you angry than don't do it! Either way I am sure you will loose weight!