Slow speeds, video's constantly buffering, web pages slow to load

Okay, replaced modem yesterday 7-18-22 at 4:10 PM. Took 45 minutes for it to configure itself on the network, speeds were 3.91 Megs right after the install. I got 24.61 Megs at 9:53 AM that same day with my old modem, so I was really wondering if the modem was the issue or not. Anyway, aside from speed tests I decided to just browse and watch a few video's, everything seemed better than before so I am happy for now. My OLD HT1100 modem is so old Hughesnet doesn't want it back, LOL. I just got 13.77 Megs download so things are looking better. https://testmy.net/quickstats/NomisNirrad

Thanks for the help guys, I really appreciate you spending YOUR OWN TIME to help me out! We can call this one closed for now.