Makes sense. Probably like common knowledge not to use shotties on larger maps. However, there is always that one person who does, which is usually me, who camps a corner. Funny as hell, but agitating, too.
Don't be so hard on yourself. It takes time to learn all these little tricks not to mention use them effectively. I didn't get good with shottys until MW3 but I started playing back on MW1. Practice makes perfect that's all.
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