On par with Doom 2016 in terms of quality and gameplay, if a bit bloated, but it lacks the great environmental storytelling. I'm well aware most people don't care for story in FPS games. But the environmental storytelling in something like the first Doom, Doom 3 and Doom 2016 adds a great layer of immersion that improves the game.

The "chosen one, God slayer" story this game has is not only written poorly, has no emotional impact and slows down the pace but it actively detracts from the experience. It's downright embarrassing at times how much they try to sell the Doom Slayer as a cool dude everyone is afraid of. The games I mentioned prior make him seem cool without trying hard to, in a very organic way.

I liked it, but unlike doom 2016 i didn't love it. It's hard to put my finger on what wasn't as good about it. Eternal pushed the colorful, metal album cover aesthetic up a notch or 12 in some spots, but was a bit of a mixed bag. It would go from a painfully retro level design area(think a banal shooter from the late 2000) to a huge beautiful vista with interesting mechanics incorporated. It also did some interesting things with its core loop, that i don't recall being quite as established in the previous game. Something about its overall locales exhibited just didn't feel as tight as the previous game for some reason. And it had a few cool cutscene sequences but maybe needed a few more sprinkled without emphasizing the doom slayer's importance

This game was great for about a year then became worse with each update.
With each rework the game got more broken, with each balance update it just became less fun.
That said, the events were good. I like the characters. The 6v6 meta seems to mechanically be optimal, especially in comparison to its (ugh) sequel. The updates really came at a snail's pace, but at least the game was pretty replayable.
Being able to earn loot boxes for a flat one time fee at launch was a HUGE plus in this game's favor.