I've been saying this for years, and I finally drew the line and am not collecting 2021 Topps flagship. I generally like to collect the obtainable inserts with my base sets. But this year, the inserts are absolutely nothing but reprints or new players in old designs. Only one insert with some original thought behind it. And you can hardly find those. Previous years inserts are chock full of more shiny cards of the big stars and not much else. And then they started putting less inserts in each pack. And I agree that parallel inserts are completely useless. And annoying when you can't tell it's a parallel because only a little sliver of one corner is the other color.
I'd really like to know how much of a product like Big League they sell compared to the other shiny rookie saturated junk they put out. I'll bet it doesn't do that bad. They cater to the chasers and the hype machine, but I bet there are plenty of us that would be happier with just simple products that are easier to complete in a couple boxes. I'll stick with Ginter, which at least has some creativity in it's content, and maybe not even that every year. I'm done with flagship. They've "jumped the shark".
I'm continually entering tradeable inventory. Full want lists are at https://thecollectivemind.blogspot.com/p/baseball-wants.html Use the green tabs to navigate.
Have entered 1994 thru 2021 baseball and 2009 thru 2020 football so far. Don't have many newer than 2020 except A&G in baseball, and very little beyond 2019 in football. My extra hockey is older than that.
The best I have for a tradelist otherwise is https://thecollectivemind.blogspot.com/search/label/Disperse%20the%20Hoard