I think this forum has always been very easy-going and open to people who come here where English is not their first language and about not making an issue out of that. Napo pointed out that you misspelled Thiem's name, and you dislike him. I suspected the jab was to ask if it was about not liking him. (It was a minor point, and I can't speak for napo why s/he thought it was worth pointing out.) But that is not about misspelling English, only his name, and I'll give you it's easy to switch the vowels.
There are plenty of native English speakers here who make spelling and grammar errors all the time. (I'd like to take this opportunity to point out that the difference between "lose" and "loose" on a sports board is rather significant. I'm looking at AP here as a top offender.) You write in completely fluent English. We all type fast and don't always check ourselves. I think the general position is to just give the benefit of the doubt, where comprehensible. I will admit to tweaking Fiero on pair vs. pear, as a pile-on, earlier, but he is a native speaker, and he did bother to put "pair" in quotation marks, so either it was a joke I didn't get, or I just needed to poke at him because it is one of my favorite sports.
I don't think the spelling and grammar police have just descended on TF.