The touchpad is improved to me at least after I added both VoodooSMBUS and VoodooRMI Like @Jake Lo suggested.
But another thing is the touchpad was disabled for like a second after typing any character with the keyboard (I think this is the reason that made the touchpad feel clumsy) so I disabled `DisableWhileTypingTimeout` in VoodooRMI and `QuietTimeAfterTyping` in VoodooPS2Trackpad, surprisingly the default value is `500000000` lol
I attached my EFI with these changes, It's basically the same as OP but I made changes stated above and replaced the BCM wifi/bluetooth kexts with intel kexts for the combo card that came with the laptop (intel 8265)
EFI.7z