I actually have played BL4 a bit since it came out. Level 17, arrived at the 2nd zone.

I will give unbiased answers to any questions anyone has about it. First off
>is the performance really that bad?
Yeah. It's dying down now because they managed to fix some issue with Frame Generation, so now with DLSS or FSR or whatever it runs """smoothly"" (generally 60-100fps).

However the performance is still ass and there are regular stutters without FSR. With FSR there are not many artifacts, main visual issue is on certain paths/roads there are some weird black lines on the ground. But yeah, performance is ass.