Please help me to find the relevant idiomatic expressions for he following two expressions:

1. When someone is trying to advise you to do something and s/he is
not doing that thing her/himself, you tell her/him that if it is better
and there is some benefit in that thing, do it yourself.

2. When it is the insiders themselves rather than outsiders who stir
the situation and make the situation coplex and complicated and people
say " See................................"

Thank you in advance.