Google in particular is great at tech but grew from a very simple product (simple as in product surface area - a search box – the supporting infra is a different story). Their biggest issue is inability to deliver complex products that are coherent (1) with each other and (2) with itself, over time. I think mainly this is because they're not respecting the user (ironic, since that's officially their core tenet). Why? Because they are evil? No, mostly because they don't understand them. Employees live in a different world, demographically, socially, economically, everything. They've also never had a strong culture of truly understanding and embracing their user base. So they decide everything upfront without validating it externally first, and are genuinely surprised when they miss the mark. "That's so weird, all the execs & directors thought this was a good idea. Well anyway, I got my promo, better move on to the next team."