1.0. Top 2 disappointments of Google Tag Manager which I had. Psychological help for newbies in it

Want to tell you about my top disappointments of Google Tag Manager , which you might experience too. There are more in fact, but I want to tell only main.
I want to warn you. So you to be less disappointed.
Psychological warnings and motivation for beginners in Google Tag Manager. Psychological help for newbies
Maybe this will help for you too if you are newbie or even not so newbie in Google Tag Manager.

Sources:
My experience.

https://rumble.com/playlists/AItzYXkWWqg