To believe the statement that Lear reminds us of a child in his madness would mean his actions, thoughts and sorrows are not great enough to be classed as a man. The fact that Shakespeare influences the audience to feel pity for Lear through his mislead actions should not be viewed as a degrading part to his character. Lear's sense of realization of his harsh actions towards Cordellia shows the audience that he can now see the errors in his ways, with experience showing him so.
"I did her wrong".
This line implies that his sense of madness has enlightened him to his wrongdoing and not in anyway childlike. However his actions in tearing off his robes can be seen not only to signify his fall in power and respect but also as a reflection of his birth like state. Lear's role reversal with his daughters Gonerill and Regan can be seen in the line.
"you should be rul"d and led".
showing his infant sate and status. From this reception from his daughters he starts to lose control of his emotions bursting out in rage and insulting his daughters even though he promised himself he would not, as a child might. An example of this is his attempt at controlling his sorrow.
"down, thus climbing sorrow".
as if as a last attempt at concealing his grief.
To understand Shakespeare's thoughts behind how he would have liked Lear's character to be viewed one has to see whether or not Lear is granted enough sympathy making it the genre of a tragedy after all. His sympathy lies in the fact that his unnatural daughters who he trusted and loved explicably, betrayed him causing him not only to lose his role and respect of king but more importantly to endure the suffering while he falls in dignity. Lear's sense of betrayal by his daughters leaves him with a crucial feeling of sympathy that is essential for the play to work. Though through Lear's stupidity and vanity his ability to see past the exterior of his daughters is reduced allowing himself to banish the closest people around him that love him, for speaking the truth.