The Lakers are not an average or bad team.
They are 15-11 while playing against a strength of schedule that has thus far been the 2nd hardest in the league and played only half their games at home. They have also already played a back to back to back.
This was a tough loss to a contending team.
The Lakers are better than the Celtics, but they aren't that much better.
Both teams are very good defensively but below average offensively. The Lakers have better top options, and actually should have a much easier time scoring in close, tightly-defended games because of their enormous front court. They lack depth, though, which the Celtics have.
I would put the Lakers' ceiling for the season (barring a major move at the deadline) at the WCF, though I think it's more likely they lose in the 2nd round again. The Celtics are a 1st or 2nd round out, depending on who they draw in the first round.