Drop this story, it isn't going to bring merits in groups having interest in you, many high level Wow players who raided hardcore in the raids claimed 14 is easy and they perform horribly bad.
No one cares about parses in progression, as long you make the DPS check who cares, and you lack gear to even come close in comparisons. Week 1 groups give up time just to stay alive and get more prog time spent in.
Don't over think on mechanics, E11S mechanics are far more simple than you actually believe. Prog is prog, we all get frustrated trying to push the fight but the point is you have to keep it fun and enjoyable, and everyone is on the same page.
We can't answer this if we don't have any footage, words are words.
A: Only possible if that was the statement, no one would go time wasting who is new when they expected everyone to know the fights. Parses doesn't matter in progging, whoever thinks otherwise needs a brain check since you should focus mechanics 1st. If you get stuck an impasse then worry about DPS.
B: We can't answer much to this.
C: Raid Leader should be talking to you private if there's a problem in a constructive way. It's either one you have issues yourself, or the raid leader is incompetent. I raid hardcore now which I started in SHBs and cleared week 1, I was just a Mid-core > Semi-Hardcore player before in the older times of 14.
I will give my best insight I can.