I do think the tone was a little off by saying "playing Br properly" personally, or "being a drag to your teammates" as every class has some form of learning to it, and screwups are inevitable even to the best players. I think the intentions are good, but it just isn't worded correctly -- and just my assumption, but I'm guessing English isn't OP's first language, no offense meant. My initial response is just in regards to the massive post OP responded with to what looked to me as a meme on reddit.
I understand the whole thread. BrHu can let you play aggressive and make mistakes, whereas BrPh has less room for those mistakes. BrPh is undoubtedly stronger, but that doesn't mean you need to rush into it. But similarly, sticking to BrHu or practicing elsewhere isn't necessarily needed. Instead of going for that Grace Might on your units, maybe use Grace Stamina instead so you have more room for error. I'm not saying go all out on the HP, but making some sacrifices to get a little more would be nice. EP6 hurts anyways and even if you are arguably above average, you aren't getting away with 1000 hp really. Not even with a Hunter sub.
Every class has a learning curve -- it's really up to you to not only push yourself towards it, but to give yourself the tools, take the time to do content and practice, look at other's examples, finding the keybinds you feel work best for you, etcetera in order to do well with it. This thread was just meant as a warning that although you might have heard BrPh is a better class combo than BrHu, BrPh is much harder and more dangerous, and you may want to make sure you understand how core parries are to Braver before getting into it.
If you still aren't too confident, global has had access to the buffed Guts drink. This will increase your HP by 50%, meaning you can take a few hits before dying, but at the cost of damage. However, SOME damage is better than none. You can utilize this while still getting used to using techs for movement/positioning, even doing solo things like masq by dropping megiverse or zanverse or whatever, just to get yourself some confidence in the class.