I don’t mean anyone specifically in this thread, and I don’t know if it qualifies as being a Jerk specifically, but I see it all the time and it bothers me. People come consistenly late to shul, spend precious few minutes actually davening, and then rush out before it is anywhere near over.
There is someone at my minyan that comes at the same time every day, 7:05 to a 6:45 AM shachris, and he is gone by 7:20. It probably takes him the whole 15 minutes only because he is learning daf yomi while he is davening.
Meanwhile I come early and have to struggle to have enough time to say everything (with at least minimal Kavanah) along with the minyan. I usually stay long after the minyan ends sat 7:30. And yes, I work for a living and have a family.
I get the most upset when I see people flaunting the Kovod of the tzibbur and minyan publically. Just this past Shemini Atzeres, our minyan started davening (Brochos) at 8:00. Someone walked in the shul at 8:55 carrying a coffee in one hand and his tallis under his arm. Even though we were already past Borchu, He proceeded to talk to people right in middle of the shul. At 9:25, as we were saying Hallel, he was still standing there wearing his Streimel, not yet even putting on the tallis. He showed no interest in what was going on around him.
Interestingly, this same person, when he davens by the Amud, takes three times longer than any normal person can stand, streching out every word unnecessarily and singing ling songs between each sentence. Maybe he has a different sense of time.