It's hard to tell as he obviously doesn't want to be a pro anymore. But his team played against pro teams in the past, e.g. minor qualifiers. He isn't terrible but not outstanding either and for higher pro level play it isn't good enough if minor qualifiers or MDL is already a challenge. Also NA FPL isn't on the same level as EU FPL and in general players there don't take it very seriously. And pugs and pro play aren't the same thing obviously.
Also, for reference, JasonR also tried to become a pro and failed. I don't mean to hate on streamers but being good in FPL is still clearly below actual pro level.