Thanks guys and gals. I spoke to my wife this weekend (yes she's not mad at me anymore) and she actually gave be a B.
Part of the reason I don't spend much time with them in the evenings is because they're watching TV, and I'm not particularly interested in cartoons and other kid programs - that's something my wife does. Sometimes I'll pray with them and put them to bed, but I mainly defer to my wife for that.
I guess in my initial post, I didn't mention something of the good things I do... every morning starts with a big hug or a kiss on the head. They help me with breakfast while I help them pack lunches. I pick them up from after school activities and make it a point to talk to them instead of giving them my phone. While I don't spend enough time with them during the week, it's different on the weekends. I've taken them camping, going on bike rides, swimming, etc. This past weekend we went to Good Friday service, I spent time with my daughter while my boy was doing BJJ, went swimming Saturday afternoon, played tennis Sunday afternoon and had the boy help me with the steaks. My son is addicted to screen time, but he can be pulled away if I give him something interesting to do, e.g. He did all the prep on the steak and even did the butter basting while I helped.
Where I can improve on is my temper. I get wound up when my kids won't go to bed or push back when I ask them to clean up. Getting them away from their screens is another source of frustration. But I definitely need to improve my communication with my wife in front of the kids. Both of us can get pretty thin skinned and get mad at each other, get snarky or raise our voices at each other. Definitely not the right example in front of the kids.
Still lots of things to work on, but I guess Friday was an anomaly since they still cling to me at times, and want to spend time with me (as long as there are no screen around). Thanks again for the input. I'm not too worried about my daughter since she's a good student and has great friends (I know all of their dads), but worry about my boy who only has a few friends and thinks school, Chinese and piano classes are a big inconvenience.