You laid this at the feet of an incredibly toxic gaming community. Despite it being well written you are going to be flamed because the vast majority of people who post here are mouth breathing neckbeards.
That out of the way. I have been hesitant to join partake in activities with younger plays due to the frenetic energy that you bring to the game. I am 32 and the fast paced talking at loud levels and about non-important items leaves me with a migraine. But I am not going to bully you or give you grief, chances are I will leave the fireteam first.
I hope you find people to enjoy Destiny with because it can be a blast with a good fireteam.