This is what my signature looks like:

If you notice, the parts that I put a red line on look good compared to the rest of the parts that are built using ██████▀▄█░░█, but the only difference is the use of this
[tt]
The one you shared above looks absolutely perfect, or so I think, but you didn't tell us if you are viewing from a pc or mobile, but all the same, it's still easy to tell that you are possibly viewing from pc.
tt was giving good results on the BTT forum, but I think it is better to remove it with some changes to the signature code and the result will be better.
In addition to that, taking into account that the size of the width is limited compared to the height, it is therefore necessary to delete some parts that are created by blocks.
Well, I honestly know absolutely nothing when it comes how signatures are designed, and neither do I know anything about BBCODE, but all the same, I think the mistake the designers are making is designing signatures for btt and altt exactly the same way with the same elements, attributes and so on, possibly because they assume both to be crypto forums, which is correct, but they forget that both forums don't have the same settings, or programmed to function or display things the same way.
Signatures designers should find out what style appear really good on this forum for both mobile and pc users, and stop using btt style of design on this forum expecting it to appear same.
Just my thought.