It needs to be combined and sequential: delay entrance to the ground; have statements with 'tik tok' length clippable, SSN and YT segment excerpt-able and longer set of demands - drawing upon the earlier mission statements and making it clear that it's about oversight and stewardship, institutional direction and accountability rather than just buying a headline player - ready for the mass-media as well as through the fan channels with global reach.
Organize a larger (hundreds rather than one or two, categorizable as lone-wolf 'pitchside invaders') peaceful protest on the pitch prior to kickoff, causing further delay and media reporting. Call once again, in media interviews and on social media, for sponsor boycott until ownership relinquishes control, which calls at least have some kind of public relations traction aggregated and potentially exert leverage.
Your mileage may vary about the current Opposition in the UK but they're likely to be in power sometime in the next 2 years, so lobby for a statement explicitly committing to forcing any club that tries to go into Super League ( something the Glazers are still banking on as the next boost to asset price) to be made available for purchase at independently evaluated market price, with fan representation on the board and with bids subject to at least the level of stringency applied to the sale of Chelsea. Even the current government (again YMMV) and one of the candidates for new Leader might echo these commitments despite themselves.