There are other platforms associated with scammers, not just Telegram. The thing is that most people only view a platform negative when they experience something bad from the platform. I have been scammed once on telegram, but actually, I exposed myself to the scam. Telegram has been my best social interaction at form so far. That I was scammed wouldn't make me label it as a scam ground. Please ignore such talks, it comes from frustrated individuals, sorry to say that. Good and profitable deals comes from Telegram too.
Other platforms may be associated with scammers but I think telegram takes the cake on this, Man! That place is crawling with scammers ready to pounce on you if you are not careful, if you do not set your personal message security right, many will flood your message with scam offers,
There are thousands of fake people pretending to be Admins on different projects willing to help you, that place is highly vulnerable, innocent people can easily fall victim.