It’s not an exaggeration to say the Los Angeles Chargers ’ most controversial draft pick this year was second-round offensive lineman Jake Slaughter.  Slaughter was arguably the top center in the draft. But at the time of the Chargers drafting him , they had already signed Tyler Biadasz to play that spot. Onlookers went into the draft expecting the team to make its first big actual splash at the guard spot with…an actual guard.  No shade to Slaughter, either. But the Chargers signed Cole Strange in free agency to start at one guard spot, which was already underwhelming compared to the perceived need there.…