Not just design. I was so excited to get a 5g oneplus 8,I'd heard great things about the 7 and 7t.
Well I went through three of them with T-mobile and all 3 had serious issues which varied, but all 3 had a very serious battery issue.
All 3 phones were new out of box, and all 3 needed to be charged multiple times per day, probably about 4 with light use. All 3 got hot, and I believe the culprit on all 3 was the front screen fingerprint reader. Upon checking advanced battery usage tab, screen took up 98% of the battery, something I've never even heard of.
Constant random reboots, loss of signal and having to reboot to re-obtain, so hot it was uncomfortable to hold or have in pocket.
I thought about getting a 7t McLaren or whatever, but decided against it due to lack if 5g at the time.
I really hope they ironed out the issues because I'm definitely over Samsung and can't wait to get rid of my current S20+. And the 8 was really a joy to use, wasn't even the pro version and seemed far faster than my s20. Shoot, it took me three failures to finally be forced to try another phone.
Edit: fix words.