Reinstall trackpad by following step 8 in reverse order but only tighten the 6 screws at the trackpad (orange) firmly and leave the 6 screws of the case (red) slightly loose

Open the MacBook to nearly 90° so that it stands stable on its display case.

Check the feel of the click. Does it go back gently into rest position? Has it enough stroke?

If not, you might have chosen to rigid or to thick material (or both)

You may also try to readjust the central screw which is marked in step 10 and which you hopefully did not unscrew!