sorry, don't like it..
have no idea why, maybe it is because of your customization
I don't know much about forums, I base my opinion on the visual design and I don't find this forum, let's say "cozy"
a few years ago I wanted to add a forum to my site, and after checking all popular forum engines, I chose myBB.
anyway, it is also not responsive and I am too lazy to add a responsive style CSS on my own...
I am more fan of this style of forum engines - https://mexicanroutes.com/forum/
anyway, I abandoned it...