The majority of public handicappers aren't good at all. Could be on a network, could be at the track, could be on their twitter feed, they just cannot provide consistent reliable results for the fans actually paying attention to their selections.
One of the online handicappers who publishes the "A" & "B" charts gave out a Gulfstream mandatory Pick 6 ticket that would have cost $9,420 and still did not hit it with all those combinations played. The last race winner that day was $7.90-1 going off as the 4th choice, in a field of 12, & in that leg the handicapper went nine horses deep, to only lose.
These guys win one big handicapping contest, or hit a big ticket, and they think they know everything about horse race handicapping to make them experts