So, it's complicated. Trump and co absolutely would cheat, but there's no proof that they cheated in that exact election. However, Russia/Iran/China (but primarily Russia) has also been stoking division in the US for decades, very successfully in 2016 and 2020, as they worked with Trump/Bannon/Manafort to stoke the whole election denial thing. In 2024, this is also their MO to stoke election denial but in Democrats this time. So there are definitely outside influences to push this narrative.
A ton of those posts in "somethingiswrong2024" are so fishy and unhinged. I'm still sane, so it's weird to see so many crazies just blatantly call everything fake.
Having said ALL that, who knows what the actual truth is. All I ask is to understand that there are nefarious domestic (Bannon, Thiel, etc.) and foreign (Russia/Iran/China) forces to sow further division, and to use an ounce of critical thinking before going crazy and sharing unfounded information.