Respect those who take the time and energy to help actors, through teaching, coaching, managing, being agents, doing photos or videos at cost or below cost.
They have overhead. They have lives and families to feed. They often are overwhelmed with talent wanting their help but unable to pay. The cost of living, doing business has gone up. In many cities the cost is prohibitive (which is why many agencies have closed their doors).
Instead of attack. Take the time to say thank you.
If someone is not for your, or cannot help you, or is too busy to help, do not say negative things about them...just move on until you find your answers.
If you disagree with their advice or technique, do not attack them or try to smear their name and their way of making a living.
What does not work or help you, may work for someone else.
Take a minute to thank those who have worked wtih your, are working with you, have supported you or believe in you.
And focus on what you have to do.