Earlier quoted context omitted.
This seems like a negatively charged take. Vampire Survivors could have been made in a ton of different engines that are far far less capable that Godot, for example. The engine is not the thing that holds back a product from succeeding. This is the same as saying "no FAANG company uses X language/platform so X is a toy", it's far too reductive and not actual reality.
As someone who’s played a lot of games… I disagree. These days I specifically avoid Unity games because they always feel janky, and yes it absolutely is the engine.
As someone who has used Unity a lot, it really isn't the engine. You're only noticing this is the whole "no good toupees" thing. The thing is, the Unity Assetstore makes it very easy to hack together something that kind of works, but because nothing will quite fit together it'll be a janky mess.