why is our side so accepting of the results?
For the sake of national unity. Even if it's justified, what good would it do to publicly complain? It would just encourage anger towards the President and increase divides. And if the result could be overturned (it can't), would that really be better? I think the response of Trump loyalists to the election being "stolen" would be far worse than the anti-Trump protests we've seen so far. Clinton's Presidency would be marred with violent protests--perhaps downright rebellion--and harsh calls of illegitimacy from high-ranking officials.
Also, I entirely agree that the electoral college needs to go.