sorry for asking where the SPFT log file is haha... I found them and zip them up in here
.....thank you for your help!
edit1: tried to go through stock system recovery (e3) and tried to "reload" the whole system by using the full phone content backup (file name is backup.ab, about 800mb) made using the command adb backup -f ......it doesn't work... now when I go to recovery, there are only 2 options: reboot system now, apply sdcard:update.zip. even after I removed sdcard, there are the only 2 options available. the apply update from cache is gone, factory reset is gone, backup and restore user data is also gone.
then on the bottom there is E:bad boot message "sdota"...... Please continue to update your system! ....I read through google that this happen to someone who got a fake samsung? but I don't have a samsung, although this phone does physically look like a a samsung..... I guess now it makes me another victim? haha...