They do all look alike! I will take a pic like these to help with the iding. ThanxA thistle, I’d say. But bitter lettuce is another close relative. There are about a million chicories and they look pretty similar up front. Serrated green leaves, usually with obvious hairs. Multi petaled yellow flowers. If it makes you feel better, here are a couple of pictures of different dandelion relatives, they really all do look alike. I only recognized catsear for the first time last year.
If you look at the first picture, looking at the flowers sideways, you should see why I think your earlier photo is a chicory.
View attachment 260717
View attachment 260716