Did Chara REALLY Destroy The Timeline?

I truly have my doubts. So allow me to express my theory on what ACTUALLY went down. My Full Uncut No Save Geno Playthrough    • NO SAVE UNDERTALE GENO RUN UNCUT   Songs Used    • Sister Location OST Extended: Venta Black      • Undertale Yellow OST: 117 - Flock Together      • CORE / Truer Than Fiction | Super Smash Br...      • Undertale Red & Yellow OST: not enough      • Undertale Yellow OST: 127  - Enemy Retreating      • Freddy Fazbear's Pizzeria Simulator FNAF 6...      • Undertale Yellow OST: 076 - Main Menu 5 (S...   0:00 Intro 1:31 What is The World? 2:06 The Barrier 3:06 Sans's Dialogue 4:26 A Threat to Both Humans and Monsters 5:11 Frisk and The Code 7:07 Our Soul 7:53 Abyss 8:13 True Reset 8:34 Soulless Pacifist 10:00 Recap 10:51 Outro