Nope. Cannot agree, and I've touched on this before.
Robocop is about Murphy reclaiming his humanity.
Robocop 2 is him realizing that despite reclaiming said humanity - he can never go back to his old life. He becomes bitter AND more robotic because he thinks he has nothing left. He starts to act like a machine - subsequently getting his ass handed to him by Kane. It isn't undermining the original film, it continues it by pointing out (unlike the terrible reboot) that Murphy cannot get back what he lost.
After getting rebuilt and nearly driven insane by OCP treating him like a machine, he pulls a desperate move to clear his head - literally. His talk with the psychiatrist reflects this, he wants to move while he's stuck in the chair, he wants to go do things - but he has no reason or motivation to do so. When OCP monkeys with his brain and turns him into a literal robot, he struggles against it. He realizes his humanity is part of his strength and rallies the other cops to take down Kane. He uses his ability to think like a human to take down Kane. The motorcycle vs van scene demonstrates this. He knows Kane is an ego maniac and won't back down. Kane ironically doesn't use his head - he could just avoid Robocop and continue running. But no, Murphy taunts him, goading him into a game of Chicken, and Murphy knows he can win that game. His machine half is all logic and procedure - his human half is about intuition and cunning.
A machine would never have thought to try to drop Kane from a 10 story building, or lure Kane into a trap with the Nuke. Hell, he uses the power of continuity to remember "Hey, I've got this cannon from before I used on ED-209, probably good if I bring that along."
There's a reason the last line of the movie is "Patience Lewis. We're only human."