You cannot judge speed from the passenger cabin! Period! So make no accusations there, please!
I always explain, and you can find it in the other thread, but the 737 has a very firm main undercarriage with little give. It is very hard to put it down softly. Every arrival is a thump. I don't know why it is like that, Boeing will know. I have flown it for 10 years. You can land the 747 and the 757 so soft nobody can feel it, but every arrival in the 737 is like there is no suspension at all. So a firm arrival feels like a bad landing. It's not- don't worry about it- they do it every day.