Which word do you take objection to? Considering he begins each rally with the January 6 "patriot" anthem, I stand by the "his" word. He clearly aligns with the folks who he considers "political prisoners" (his words not mine).
As far as "coup" - I'd say summoning thousands of folks to the Capitol, then not calling for dispersal once they have physically breached the perimeter of the building where the Congress and Vice President are assembled to certify the election results (where he lost), plus (arguably, more importantly) engaging in a campaign to establish networks of alternative electors in key swing states that do not match the popular votes in those states, then I'd say "coup" (granted, with a "attempted" modifier would be more accurate) would be a reasonable word to use for the events that transpired.
As far as "coup" - I'd say summoning thousands of folks to the Capitol, then not calling for dispersal once they have physically breached the perimeter of the building where the Congress and Vice President are assembled to certify the election results (where he lost), plus (arguably, more importantly) engaging in a campaign to establish networks of alternative electors in key swing states that do not match the popular votes in those states, then I'd say "coup" (granted, with a "attempted" modifier would be more accurate) would be a reasonable word to use for the events that transpired.