1. Thanks for warning me about jumpscares.
2-3. Developer could try optimizing but other than that, it might be because you have too much storage being used, too many tabs/apps open or processing in the background, or you need to get a better device.
4. That is a you problem. The kink has been known as "Ebony" all over the porn community. It's not going to change, so don't be a snowflake. You don't see Japanese/Asian people complaining about their race being the number one searched race in porn, do you?