No offense but #1 your not supposed to call out or name another player in the forums.
Since you did I looked at this gents profile. Your a L92 Tour Master He's a L81 Master. Your both hitting off the same Tees, He's playing on your TM Tourney greens in a match play round I presume. Looking at his scoring history he's had a couple of sub 60 rounds but everything else looks pretty close to yours. You play more ranked games he plays more match play, ready go's, Blitz and tourney with nothing seemingly out of average with the exception of a round or two. So I don't see where there was a significant difference between the two of you in that regard.
Does he win a lot of credits playing Match Play I would venture to say he does. Looking at his Match play Stats he has a very impressive win loss against players his tier and below but he's 36-40 vs Tour masters. So he is close to 50-50 vs TM's Here again no offense intended, yours is 5-26 against other TM's. Basically looking at your record in Match play your don't seem to fair well playing against any tiers in that mode of play and there's nothing wrong with that. From what I see in your stats it seems like me you don't play a lot of that. So to me playing a Match play round for 250 credits when one don't fair well in that type of play is kind of asking for it. So my suggestion is if you want to play Match for credits it might behoove you to play it more and get better at it before you play others for credits.
As far my take on having his account closed, No one has to accept a match for credits if they don't want to lose them, you go into it full well knowing they are up for grabs. Sorry but that is just my opinion be it right or wrong in yours or others eyes but calling out another player because you lost doesn't make you right.