Sims 4 runs slow and laggy mostly at the beginning of the game! Help...>_<

Hello! I would really appreciate it if anyone can help me with my problem..

My Sims 4 runs slow most of the time, especially at the beginning of the game. It takes forever to load especially when loading career lots (it will take around five to 10 minutes to open a lot) and it always starts as very laggy (the game will freeze around 10-15 sec at the beginning before slowly runs with 1-5 sec lags whenever I move the cursors, then runs smoother.) Sometimes when they are walking (especially when they had to pass a narrow place), my sims also tend to randomly blink/teleport themselves to another place around one or two second before finally continue what they were doing. What irritates me the most is that there's almost no difference between speed 1,2, and 3 (I wonder if this happens to everyone?), so the time in my sim's world runs slowly and makes me really sleepy whenever I play. It's not fun anymore!!

I have custom contents that I use in the game (mostly poses), but not many, because the game was even slower when I put more of those. 

Here is my diagnostic results, hope someone can help, and sorry for my broken english! >_<~