It's all good here! I've been there done that and had to retract my foot out of my mouth more than once.
Due to differenace in opinions, we try to avoid getting to deep with our personal convictions even when it comes to machine brands. We do however have some very strong opinions on how to do things correctly, LOL.
Over the years I have learned to use words like, It looks like, it might be, it is possible that, and by doing so leaves room for two things.
1. I could be wrong or just not have all the facts that I think I do.
2. Someone else might know more about it thatn I do and by leaving the door open they might just help me figure it out.
3. By not being so single minded about my opinion it does not become a personal challenge if someone disagrees with me. Now we are just trading thoughts and yours has value as well.
Don't be too hard on yourself, I bet some of us shared the same frustrations that you posted. (Or not)
Back to the machines,