safari 15.0 on OS10.15.7 will not load ebay or bank sites

Same here... and not just eBay or bank sites. Numerous sites. For weeks stretching into months now.

Apple is such a huge company with such massive revenue and they can't even get their browser to work?

BTW - none of the complicated suggested fixes like reinstalling and messing with the settings work. And few Apple users even want to mess with it. We bought Apple because it was supposed to work without complications.

I'm ready to kick Safari to the curb.

Hello and welcome to Apple Support Communities, krpeake!

We understand you're having trouble loading a few sites on your Mac. We'd be happy to provide information to help you address this.

Try the steps suggested here: If Safari on Mac doesn't open a webpage or isn’t working as expected

Have a great day!