It is crucial to only fight for or against policies not personalities.
Cutting fuel and food subsidies, negotiating loans from the IMF, auctioning off the Suez canal to foreign investors, privatizing state companies, and just generally following step by step the neoliberal program, all of these are policies that pre-date Sisi. And all of this will certainly continue even if he is overthrown, because these policies are being dictated to him, not by him.
As long as you are revolting against a personality, the powers that are dictating policy have no problem exchanging that individual for someone else. It is much less important to overthrow Sisi than it is to overthrow the powers that he works for.