I'm guessing you have other reasons why you're dissatisfied with the phones besides the wallpaper, the FPS, and the charging. Those aren't the usual things I think about when I think about high end phones.
Let's dispense with the wallpaper quibble, since that's clearly not relevant. I mean, you know how to change the wallpaper, and use live wallpapers, right?
I haven't used other in-screen FPS's, but I can say that my experience with the 6 Pro has been totally fine. It works, it works promptly, and its failure rate is about the same as traditional capacitative FPS's. Maybe it doesn't activate the exact very moment I touch the screen, but if the difference in response time is on the order of hundredths of seconds, i don't consider that a major point of comparison.
As has now been documented, it's clear that charging speeds are not as fast as Google claimed -- that's definitely a black eye for Google. But to me, the race to faster and faster charging speeds is kind of like the arms race of who can make a phone with the least bezel, or even negative bezel. Superfast charging has not been important to me personally, and there is always the concern that the faster you charge a battery, the more you contribute to battery degradation over time. I'm also curious -- how much has your battery drained by your lunch break? If it's enough to require a significant charge, you're either using your phone really heavily (which, of course, may be understandable depending on your job requirements) or something is wonky and causing the battery to drain.
i would say that this phone is definitely a flagship. For me, one of the most important features of a phone is the camera, and the Pixel camera is the best around. Of course, the phone is also fast, smooth, and made with premium materials. I also appreciate the usual Pixel benefit of timely updates and -- can't emphasize this enough -- zero bloat (but of course, you get that with the midrange "a" series as well). Let's not forget the value proposition either: $899 vs >$1000 for most other flagships.
But hey, if a phone doesn't feel right to you, then by all means, move on. Everyone has different wants and different needs.