Dear PJ Quek,
There is one thing I acknowledge, and that is, the Workers' Party
isn't perfect 
Meng Seng knows our opinions do not assimilate 100% with our
party's leadership. Otherwise, we'll be worse off than the PAP

But honestly, you do not sound like you know much about WP, despite
living in Hougang 
For example, you said "WP and SDA cannot even maintain their
constituencies as good as PAP does".
I can't speak for SDA.
For the WP, it won Hougang because the PAP incumbent carried out a
botched job. After Mr Low won, residents felt he did better. This
was why he won three times. On the contrary, his PAP opponent was
into his second election, which he lost.
The Hougang Town Council has carried out many works and is ranked
among the top 10 town councils in Singapore in terms of efficiency.
As an Houganger, you cannot have not noticed 
I also do not know much about SDP and Dr Chee, but he certainly
does not seem to me as "talk politics only during the election
time". I see him appear every now and then. It is different from
saying his political activities are not in sync with the voting
populace.
You also suggested opposition "come out to organise meet-the-people
sessions". As as Houganger, you should know that Mr Low conducts
MPS every week 
The Youth Action Committee has also done welfare work. This is an
open and transparent feature on our YAC website, with photos to
accompany its factuality.
Regards