There was much value added from social media in the lockdowns, but this was a unique situation. There are many examples of social media benefits that aren't related to anecdotal pandemic crises.
The prompt isn't "social media produced a loneliness epidemic"; it's "making us lonelier". The difference is crucial. I'm only arguing for social media contributing to loneliness, not that there aren't other causes.
"Many reported being more connected." I can agree, but it's likely that these people were women and attractive and/or rich men.
Nearly 30% of men aged 18 to 30 report having no sex in the past year, roughly tripling from historical baselines. Reported virginity among young adult males doubled from 4% (2013–2015) to 10% (2022–2023). Over 60% of young men under 30 are currently single, which is nearly double the rate of young women in the same age group. These stats are correlated with the rise of social media and the other arguments I've made in the opening statements. Smartphones and the internet enabled social media to significantly contribute in creating new these new problems of comparing themselves to millions, unparalleled bullying and most importantly hypergamy. Dating app data shows men were selected for ~53% of women, while they've only selected for ~12% of men. And men have a ~2% match, while women matched ~41%. This data demonstrates hypergamy. Combining these data and my arguments, it directly corroborates that social media disenfranchised a great number of people, especially those below ~40 years old. Men because of unprecedented entertainment, bullying, and female hypergamy. Women, because of unprecedented entertainment and comparing themselves to millions. In conclusion, social media made people from the below ~40-year-old age group more lonely.
Furthermore, it can't be understated the power of the combinations of the smartphone, internet and with social media companies creating content that's heavily invested in and designed. This combination is extremely entertaining and addictive. Which is another reason as to why people spend more time on their phones. It's not just "a tool amplifies what you put in", it's social media companies spending millions and using multiple specialists to create content that's designed to be as addictive as possible for viewer retention and ad revenue.