He's not terrible, but he's pretty bad. In 151 innings, 39% of batters get on base.
Look at it this way: If you had a lineup of 9 guys who had a .385 OBP and slugged .430 then you would have a pretty potent lineup.
That's what the average lineup is like when he pitches. In my league last year, the best NL team had an full-season OPS (OBP + Slg) of .782, the best in the AL was .805.
Your guy makes every team a league best offense.
Humbug? Bah....
He's just bad.