Actually i find it quite hard to take Sebas' posts serious, but on this one he actually really has a point, if you're stuck at the wrong club.
When i was young and just started playing i really hated this part of the season. It's a bit like he wrote, when you're in a club without serious players and youth & cadet's teams then many club members are on vacation and things.
But at a club with serious players and coaches this is the part of the season when to work the hardest to prepare for the next season.
So Sebas maybe go find a club with serious players and coach and stuff.
I also understand that getting unwanted “coaching“ can get quite annoying too, but also to this there is an answer.
My method of making people be quiet, is to beat them.
Simple as that!
Most will stop their “coaching“ as soon as they start loosing.
And i tell the few who still keep talking that as soon as they win again they can coach me again.
Most people don't have bad intentions and don't want to make you feel bad, but some like just playing the wise guys.
In the end it's all just teasing with friends and pulling each other's leg...