No. He stunk it up his third year, the year the Chargers sucked bad enough they were drafting #1 overall. You can't put that performance all on him.
His first year starting (his second year in the NFL) he did pretty good for a first year starter. 61% completion percentage, 17 TDs and 16 INTs (not a lot considerin 526 attempts). And that team wasn't particularly good either (8-8).