u/Sad-Scar-737

Hey guys, some time yesterday, my wifi started to act up. On my PS5 and devices, YouTube works fine. It's a little slow, I can't play online games, and it's struggling to sign into PSN, my download speeds are normal 50 to 100 mbps. Im thinking it's my modem? Im with Belong, and I've been using the first modem they sent for years. I've tried almost everything. Nothing is helping. Should I just buy a new modem?