iPhone 6 series was a lemon that should've never been dumped on the public. Video only covers some of the faults such as cheapening out on 1GB DRAM that causes lag and frequent app reloads along with intentional performance throttling to force people to upgrade. What the video doesn't cover are defects like cheapening out on low quality bendable aluminum that led to LCD touch disease defect, etc. If you're an unlucky iPhone 6 series owner you shouldn't be rewarding Apple with another purchase. Apple should do a recall and either refund or upgrade you to a defect free model which would hopefully mean the iPhone XI without the notch.
Get a grip. Hatred will eventually damage your health. My wife and I used iPhone 6’s for three years before moving to the 8 with no such issues and only one battery replacement. Stop reading the Apple hate sites. You’ll feel much better.