I agree, i honestly think cdpr wanted to give us too many mechanics and gameplay elements and it proved too much.Some of these comparisons are valid, and some are not, such as police doesn't get killed by a grenade in CP77 versus instant kill in GTA5.
First of all, CP77 is an RPG so it will have high level NPCs that can't be killed by low level attacks, that's just the nature of an RPG versus a sim. Furthermore even in game world that would have an explanation that the sturdy high level cops have bionic and cyber implants that makes them more immune to guns and explosions.
This is a real case of "it's a feature, not a bug".
CP2077 is an RPG, not a sim like GTA5. The problem is they hyped it up to the point where people expected an RPG and GTA all in the same game.
A lot of these gta vs cyberpunk comparison videos are also made simply by haters. You can see this on Youtube, a lot of these channels have been created aorund launch of cyberpunk with like 50-100 subs.
The game isn't as good as it was hyped but it isn't as bad as it is shown to be on all these videos either.