I also tend to skip over really long posts with all the words mashed into one paragraph. I’d LIKE to read them, but I can’t concentrate long enough to get through it (or my vision goes blurry before I get halfway through).
For me at least, the default text size is fine. I can find it harder to read if people adopt a very large font size, as you don’t get many words per line, and it interrupts the flow of reading.
I don’t mind long posts either (guilty myself, as you can see). I think my only request is that rather than post a solid block, which can be offputting, people use a couple of paragraphs - which you already do.
Some people (not you!) don’t appear to realise that paragraphs aren’t just for decoration, but to help the reader.
If I see a huge block of text with no gaps, I may think: “Oh dear, this is too much hard work to decipher” - even if the subject itself is quite interesting or important.