The Telegram dude is still pushing Ruzzian propaganda and is interfering in other countries elections for proRuzzian forces. So from the facts I can say Telegram and it's boss are a KGB asset, not sure what France managed to get from the guy or it was all a KGB propaganda operation to make idiots think Telegram is not controlled by KGB.
P.S. for lazy Ruzzian cyber trolls, when you see an old account where less then 1% of shit is about Putin and the Zeds then this is clearly a real person, find more inteligent or less drunk keybord worriors.
If you wanted my reply to the rest of what you wrote, it is this: if you choose to believe a single social network/app is influential enough to manipulate an election, be logically consequential to recognize that they all are and do. Whether as a first party (the company itself is involved) or as an intermediary (via third-party bots).