am i naturally a mean-spirited person

so i've been trying to be nice and all to my teammates despite some of the stupid things they keep doing, gz early on when they get a kill and reassuring them there not bad if they say so however i was just in a match where irelia got very big very fast, and kept getting bigger because ezreal kept split pushing. deep down inside, i wanted to call all kinds of names, i stuffed it down and try to calmly explain to him whats hes doing wrong (kept doing still which got me even more mad). regardless, we won, but that game was unnecessarily drawn out. i feel like i have bit of a headache after that. am i naturally mean by nature, i can't figure it out myself?