I've found that while a good number of people who sport a fairly poor attitude to combat, the worst are the "bad winners". I'm sure most of you know what I mean...
That said, the problem with people's attitudes to shooting isn't so overwhealming as to make it so I cease doing something I enjoy. That'd be a little bit daft. It's all worth it when you and your opponent are out of bots, out of batts, running low on mines and fighting hard... Knowing that the gap between winning and losing is only a couple of rounds of magma hammers. Both people so deeply engrossed that everything seems to slow down a bit, everything you do is a risk, your awareness of your virtual surroundings increases. And you know that regardless who wins and who loses, it was so intense that both people involved will high-five, congratulate one another on a good fight and walk away from their computer with a grin on their face...
That's why I still get into combat in this game... Because what I just described above more than compensates for ten or twenty bad experiences.