Did you use a saw blade?
I think was intended as humor / sarcasm. Maybe add some advice and some smileys.
Not funny.

Putting people down is unacceptable.That’s not the way to mentor and help new builders. Everyone makes mistakes. Builders should feel OK about asking for assistance without being berated or criticized.
Yeah... I admit that I sometimes bite my lip. As a person with "hand skills," it's easy to scoff or criticize the work of others. Sometimes my jaw drops when I look at a "finished" channel or tabs.
But, I've learned to temper my snobbery.

Not everyone has the dexterity or experience working with their hands that I have.
And, it's easy to slip! Ask me how I know! I've also learned that working with plastic is VERY different than other materials like metal, wood, etc.... making it easier to slip or "booger it up." Again, ask me how I know! LOL! One thing I learned about plastic is that it can melt from frictional heat caused by the tool.
Slow, steady, and LIGHT touch are the keys.
That's why my advice usually mentions going SLOWLY. Using a LIGHT touch. Do a TINY bit at a time. And, I mean TINY, TINY bits. This helps prevent "slips." It also allows the hobbyist to "get a feel" for how the tools and materials interact and perform.
I've got GOOD hands (that's what she said!), and I still slip up on occasion (that's what she said!).
I think another factor is a sense of anxiety or urgency with new builders. It's exciting to build your own gun. So, I think it's natural to get in a bit of a "hurry." It's natural to want to "git'er done and go shootin'!"
Take your time. Soak it all in. It's not brain surgery, and nobody's gonna die. Learn as you go. Pick the brains of the collective here on the forum. And MOST importantly... Have fun!