makarakri An interesting perspective. By today’s standards, forums can no longer be customized in HTML like in MyBB. MyBB is the one that belongs in the graveyard.
I’m not saying Flarum doesn’t have its issues, but criticizing software just because you couldn’t edit HTML/CSS is quite funny. If you had opened a proposals discussion about this, I could’ve spent hours and published an extension for you — for free — that would allow such editing. There are dozens of people here contributing their work for free.
Also, I have my own Flarum forum, and in its field, it surpasses not only other forums but even WordPress sites in Google rankings. I don’t think you even know what SEO really means.
My approach might sound aggressive, but if this is how you treat something given to you for free, then you should expect the same attitude from me.