If the last supported version of iOS is 9.3.5, you have an iPad2 or an iPad 3th generation. Those came out a long time ago and had, depending on model, up to 10

If the last supported version of iOS is 9.3.5, you have an iPad2 or an iPad 3th generation. Those came out a long time ago and had, depending on model, up to 100 months of support according to https://en.wikipedia.org/wiki/List_of_iOS_and_iPadOS_devices#iPad https://en.wikipedia.org/wiki/List_of_iOS_and_iPadOS_devices... The device has outdated hardware. Many websites require more memory and cpu than it can provide. This is not (just) a case of Apple obsoleting your iPad, it just can't cope with modern apps and websites. You said you've used a mac for 15 years. I bet it wasn't the same old mac all the time. A fifteen year old mac is also near useless on the modern web without investing in upgrades to the machine.