Not really. Zuma resulted in the ANC losing votes and control of key municipalities. The EFF, while growing, are off a very small base and of course, their growth slowed between 2014 and 2019. Zille grew the party by 6 percentage points between 2009 and 2014 off a far larger base than the EFF had in 2014. And the EFF didn't even grow by 6 percentage points between 2014 and 2019. Mediocre
Zuma was the president of the country, he maneuvered his way all the way to the the top of the behemoth of an organisation that is the ANC. All without even finishing primary school. Even now he still has a sizeable faction of support in the ANC.
Malema became the ANCYL president, came back from the political wilderness to head the third largest party in SA. He brushed aside everybody except the DA and ANC with a new party in 6 years, 6 years for goodness sake. And he gave people mocking his education the finger by simultaneously stacking uni degrees while leading the EFF.
The EFF's growth is phenomenal even taking into account the latest results, and let's not forget the DA couldn't have taken all those important metros without them, giving Malema a disproportionate amount of power.
Even if you don't like them there is no denying that they are two of the most successful politicians in SA.