I have also used an LG gram for 5+ years. The touchpad is just normal.

Maybe, you say that it feels cheap because it bends a little bit when you press it. I guess that is the price to pay to have a 17 inches laptop under a kilogram.

However, I did not notice any mechanical failure. The keyboard is still as solid as day one. I just had to change the battery at some point, it was super cheap and easy to change by myself with a standard screwdriver. I regularly loose the charger, but it is also cheap to buy a new one.

Apple laptops have the best touchpads bar none. But the LG Gram's touchpad is fine, certainly no worse than any other non-Apple laptop. My only real complaint would be that it's only clickable halfway down (unlike the Macbook touchpad where you can click it from the top), but as far as I'm aware that's how it is on every other non-Apple laptop (including the Dell XPS 15)