Then there's the sticky header, on my screen it takes up 1/5th of the available space. Or the headings, subheadings and tabs that float away (proximity principle from the blog post) and the column of text, that becomes hard to read because of small line length.

It clearly looks designed, but they should take a look at this post.

There's a trend of using larger fonts sizes due to Accessibility, but it comes at the cost of reducing density.

IMO, that's a huge red flag. If the sales information puts beauty before functionality, that's an insurmountably amount of contempt they are showing for you before you even become a customer.

On an investment company it's even worse, because contempt is less likely than they just wanting to actively select dumb customers. That's a very strong indication they'll try to steal my money (I have no idea what this one site is tough, it's not my opinion on them, it's what their design choice makes me think).

But hey, it's very beautiful!