No, re-election does not give pleasure to the politician. It is pleasure, to the politician. You can guess what pain is. They try their best to do nothing, because there's little about nothing to cause controversy. After that, the thing most likely to lead to pleasure is spending other folks' money in their home districts.
Controversy is avoided like the plague.
Continuous or repeated controversy leads inexorably to pain. I've been reflecting on the experiences of three years lobbying the legislature, first defending against horrible new drug laws, then taking the offensive and proposing industrial hemp and medical cannabis bills. No amount of fact and reason is going to stir enough of the legislature until they start seeing a change in the wind direction. When we raise dust, it helps them see. Dust is the equivalent of both letters and phone calls to legislators.