As usual you have misunderstood (accidentally or possibly deliberately) to continue your tirade against class 700s per se.
Some who have the option may change to road transport as with any journey but I doubt whether it would make any noticeable difference to passenger volumes after 3 months when:
a) may of them will have become bored/tired/frustrated with driving or bus riding
b) if a significant number were to switch to road, congestion may become an issue making such a change as a fit of pique look like a self-defeating gesture. Car parking at London railheads certainly isn't easy when the commuters have filled most of the places so if your idea of leisure travelling to London is back on the cars it won't last for long.
c) those who can't just switch will continue to wait for trains and your postulation that they would prefer to wait on platforms letting two or three trains leave without them because they are too full to board is laughable. There are plenty on the MML who had to regularly put up with that who are now greatful for the additional capacity that the class 700s are bringing to the TL service.
You should note that just because a few have complained about the class700's seats/colour of walls/lack of tables etc., they are in a minority and when they realise that their whingeing won't change anything most of them will just get on with their lives.
You of course are free to change your travel arrangements at will, so good luck when your season ticket expires.