We have to go all the way back to 2000 when Bush v Gore happened and Democrats claimed the election was stolen. Actually no, we just have to go back literally to just the last election when Hilary asked for recounts after conceding and then the Democrats used false claims of Russian interference to discredit the election. Heard of the Muller probe? This is a highly unorthodox election due to the high number of mail-in ballots. We have unprecedented censorship of social media by corporations that function as arms of a political party. Trump has a right under law to challenge it. Hillary asked for recounts very late in the process in just the last election with no evidence of corruption. It is not a coup to challenge under law an election process and refuse to concede till then. It’s happened literally multiple times in US history. You are not from the US but you may be surprised to learn the US is not a direct democracy but has a system in place called the electoral college which is there for managing electoral disputes.