Lewis got a proper penalty for that (dropped to 3rd) because it became clear to everyone that in handing the place back and immediately reovertaking he'd created an advantage for himself by tucking in.
Max overtook off the track, did a dangerous rejoin, forced another driver off the track, did the instant reovertake (like Lewis 08), then caused a collision with a brake test, then attempted the re-overtake again. And after all this didn't receive a single penalty that affected his result.
Gotcha, so Lewis is unsportsmanlike as well. Agreed.