Random stutters and misinputs: is it me or the netcode sucks?

Ever since day 1 around 70% of the time I fight someone online (no wifi) there are just random stutters and misinputs. It's not everyone (again, excluding wifi players), just certain players, and I usually face things like:

• I press something and the character does nothing
• Unfinished strings even though I pressed everything
• I get jab-punished when around -6 to -9
• I am literally holding back from a distance and still get hit. This also includes getting CH'd by things like cancans when holding back (not talking about neutral guarding)
• Really hard to fuzzy guard stuff (I've even seen myself get hit by a high when ducking)
• My jaw drops when inputting the cleanest throw break and then fail.
• Of course, I duck when expecting a low and still get hit by the low (no problem with snake edges)
• I very rarely succeed when I tech roll and start mashing rage art. In fact sometimes I mash rage art and nothing happens.
• Basically any quick math I try to do with frames during the fight doesn't work (I still remember a Kazuya I fought who kept spamming ff2 into df2, 3 times I tried to interrupt with a 15f CH launcher and he kept beating me)

I played Tekken 7 online for around 1800 hours and NEVER experienced anything like this. Misinputs are one thing cause nobody is perfect, but Tekken 8 is insanely inaccurate. I'd go as far as to say that Tekken 7 wifi was more stable than Tekken 8 wired.

I just got to a rank where I can't keep playing like this, any of these things can happen at any moment, mess up with my head and there goes the round.

I face these issues with some players over and over and over, and then from time to time I run into someone else and have 0 problems playing with them.

Does anyone else experience this to this degree?

I always play wired and even bought a cooling pad for my laptop in case it was overheating but still. I have also changed the rollback settings and nothing improves, same with graphics settings.