Ctrl-Shift-I, click on a paragraph, search for "text-shadow" on the right pane of the inspector, untick the checkbox.
There is a time and place for text and retro-CRT effects, this isn't one.
Why the fuck make a tech web page unreadable with CRT effects? Thank god, there is reader mode in Firefox.
I actually find it quite readable - YMMV.
Then, with all due respect, you should not be anywhere near the design of accessible systems.
There's people reading this blog with all types of devices, screens and range of visual acuity.
Everyone says they want the weird more personal internet back, then this is what we get when someone does a weird internet thing!
I think they could get a close-enough effect by removing the horizontal lines on the text glyphs themselves. This would still keep the colorscheme and slight glow, but drastically improve readability.