well they are going for different experiences in different genres
But if we only are going to compare the combat, i agree the original Metroid Prime was mostly boring and unexciting, even compared to the likes of Other M and other Sakamoto Metroids.
but imo Retro got better with the sequels, with Corruption having excellent first person motion combat, and Echoes upping the difficulty and boss encounters(for example fans
always praise this fight or the
Dark Samus final boss)
as for Metroid Dread, i would praise the controls and animation,MercurySteam did a good job but the combat itself is very simple and not at all innovative (except for the counter thing they did in Samus Returns),i thought it was solid ,but nothing amazing and even unambitious compared to what they did with their Lord of Shadow games.
Metroid Prime 4 we have no idea how the overall combat is gonna be like, beyond that its an evolution of the previous games, but Corruption is a pretty high standard for Metroid ,we will see if they are willing to surpass it.(The trailer itself didn't show all their cards,im sure its gonna be more fleshed out than that)