Slow internet speed on my MacBook Pro

On my iPads, 4 of them throughout the house, we get close to our max 50/50 mbps internet speed from Ziply Fiber. But after noticing a lot of stalling during a YouTube video I ran a speed test on my MacBook Pro and it barely got into the teens both ways. Today I checked again after speaking with a Ziply tech because we had a battery backup red lamp on our fiber ONT box that I suspected might have caused other issues. He thought resetting the ONT fixed it, and opined that the MacBook problem may be caused if it's older (its only 3 years old running Ventura 13.1) and slowing, or it has too much hooked up and can't handle it all. It could be the latter, as I have several devices going through 2 or 3 multi-port add-ons. that said, it's rare that more than two of them are actually running devices at once. Today's speed test got into the 30's for the MacBook, but still pushes 50 mbps on the iPads.

This MacBook Pro was state of the art, top of the line, in 2019/2020 when I got it. I got far more memory than I'd ever need and the fastest processor available just to be future proof. The WiFi router is Ziply's and though there are D-link and Netgear extenders in the house, the MacBook usually auto-connects to the router itself, about 22 feet away through two walls, den/office to family room. There are almost always 2 bars on the WiFi icon on the MacBook. The iPads sometimes get funky if carried too far from an extender and show one bar, but the MacBook never moves and is always plugged in, and sometimes goes to all 3 WiFi signal bars.

So what can I do to get around this "speed bump"? I'm not sure that anything changed re. the devices hooked up to the MacBook or what was on between yesterday's teens mbps and today's 20's-30's. I tried lowering the video playback quality yesterday, but it still stalled constantly. I closed all windows today during the speed test, but it got nowhere near the 40-50 mbps the iPads see.

[Re-Titled by Moderator]