Please do a simple test. Put a ruler at a 45 degree angle and focus on the middle. This should clearly show if you have a front focusing problem.
If I had a nickel for every time I see this advice...
Focusing on an angled ruler is not effective. Say you put the AF point over the 10 cm mark on the ruler. You
know you're aiming for that line, but the camera doesn't, it's going to lock onto the region of highest contrast under the selected AF point, and that AF point is actually larger than the little box that represents it in the VF. So, most likely it will be locking onto the edge of the ruler which is passing through the AF point, somewhere along that edge, not where you want it to focus.
There's a reason that the commercial AFMA tools have a focus target that's oriented parallel to the image sensor, with an offset angled ruler to judge the DoF, but you aren't focusing on the angled ruler.
Actually, there's a much simpler test to see if you need AFMA. Select a flat target with high contrast and lots of detail, oriented parallel to the sensor. Go into Live View and use contrast detect AF (called Live AF, do not use Quick AF - the mirror should not flip during focusing). Take a couple of images that way. Then, turn off Live View and take a couple of shots with phase AF. If the Live View shots are sharp and the phase AF shots are less sharp, AFMA will help. If the Live View AF shots are not sharp, it's more likely a lens issue.