Which do you disagree with?
Hardware (C) - supposedly what's under the hood is pretty good (B) but the form factor is absolutely terrible (D / E). Huge, clunky, ugly and with a terrible stand solution. The controller has cool features that have yet to be realized outside 1 game (and supposedly, one other in Returnal) which it deserves some props for but is then pulled down by the quality and reliability on triggers and sticks. A lot of people have issue with fan noise and/or coil whine which shouldn't be a thing this gen.
Features (D) - UI is clunky and has features missing from PS4. It has backwards compatibility and whilst it's good (considering we weren't sure what to expect) it is let down in it's implementation - no smart delivery (and for all we joked about it, that's actually been a huge issue for a lot of people!), no automatic cloud saves porting over unless you pay for ps+ and made sure that you were saving to cloud, an inability on devs to take easily take advantage of next gen hardware on backwards compat games (see Biomutant having terrible res/frames vs XSX, or Rocket League and COD that are 120fps on Xbox but still 60fps on PS5), plus it doesn't have PS3 support unlike Xbox for X360 (yes there are reasons for that due to code base (cell) but ultimately, it isn't there). Vs Xbox - no quick resume, no auto-HDR, no VRR, no 1440p native support, no FPS Boost which are all features that I use on my Xbox every single day.
Software (C) - There's been a lack of next-gen games on both consoles, and it doesn't have Gamepass which is leading the way.
First-party (C, maybe a B) - I gave a C but expecting it to be a B in a week or so when Ratchet & Clank comes out. Personally, I like Miles but it's an expansion and runs on PS4 - shouldn't even be considered a full release game. Dark Souls is a remaster, and for some a fantastic one and if you're one of those people - great, but I'm not going to give huge props to a game that can be played on PS3 minus the graphics. Returnal looks great. It'd be easy to dismiss Astrobot as a tech demo, but to be fair, it's pretty fecking great.
People get caught up on the dates a game is released - what's the difference between Miles and something like Ori, Wasteland 3, Gears 4, Horizon 4 which had next gen upgrades and could be considered to be just as next-gen (in Gears and FH4 case anyway). Of course this would also then apply to God of War, TLOU2 and Days Gone. Lines are being blurred by backwards compat and next-gen upgrades. If you can access a next-gen optimized version then to me that's all that matters.
Definitely can't consider giving an A when the price has been up'd to £70 on top.