As @Spoons commented, the Charter is not the constitution. It is part of the Constitution. Other parts of the Constitution establish democratically elected governments with powers limited by the Constitution.
I disagree with this dismissive approach to s. 33, for a few reasons.
First, the adoption of the clause has to be placed in context. Opposition to the Charter varied amongst the premiers, but the basic point is that it would be a fundamental change to the the Canadian constitutional system. Prior to the Charter, the judicial review power of the courts was largely limited to the division of powers between the federal and provincial governments. The courts repeatedly said that under that jurisdiction, they were not concerned with the merits of legislation, just whether it fell within federal or provincial jurisdiction. The Charter would change that, with unelected judges judging the merits of laws passed by the democratically elected governments. That was a fundamental change, and the premiers who opposed Trudeau were concerned with it.
And even with the more limited scope of judicial review under the division of powers, the decisions of the unelected judges could have serious consequences. For example, just a few years before the Patriation Debate, the Supreme Court had ruled in a pair of judgments that the provinces had limited powers to regulate their own natural resources, and to claim the resource revenue, because the Court held that the provincial laws in question intruded on federal jurisdiction. That pair of decisions helped to pave the way for the National Energy Policy, which was widely seen in the west as an attempt by Central Canada to claim the benefit of the West’s natural resources. It took a constitutional amendment to reverse that Supreme Court decision. Constitutional amendments are rare.
And now the Trudeau government was proposing a further expansion of the powers of the unelected courts, to overrule the policy choices of the democratically elected governments. And the federal government appoints the judges of the Supreme Court. Some of the premiers were wary of the proposal, and said that the proposal had to be thoroughly vetted, and have substantial provincial support
Instead, Trudeau was saying that if the Premiers didn’t agree, he would go to London and seek fundamental constitutional changes without the support of eight of the ten provinces.
The premiers strongly believed that approach was not consistent with the federal nature of the country, that the federal government was proposing significant constitutional changes, over the opposition of almost all the provinces.
Nor was it just the western premiers. (And, as an aside, even if the opposition did largely come from the west, why are you so dismissive? Are the western provinces not equal partners in Confederation? Are you saying that western political opinions don’t have legitimacy, and only Central Canada counts?)
Trudeau only had two premiers supporting his proposal: Davis of Ontario, and Hatfield of New Brunswick. All the other premiers opposed it, for a range of reasons, but largely focused on that basic question: should the power of the unelected judges be expanded, and the powers of the democratically elected governments be reduced, in matters of social policy?
And when the logjam broke, the three AGs who put the deal together were Chrertien for the feds, McMurtry for Ontario, and Romanow for Saskatchewan, working from a draft prepared by the Newfoundland delegation. It wasn’t just the western premiers. Trudeau didn’t like it, but his position was badly weakened that night when Davis of Ontario phoned him and told him that he thought it was a good deal, and that he would withdraw his support for unilateral changes by the federal government in Britain.
Trudeau reluctantly told Chretien to get a deal, provided it had the support of a strong majority of the provinces. Chretien worked through the night to do it. Lougheed, Blakeney and Davis were crucial to those discussions, because of their political alignments and relations with the other premiers. Peckford also played a significant role. By the end of the night Chretien had the deal, with the nine anglo premiers, but not Quebec, which is an entirely other issue. The lack of Quebec still echoes today.
Also, the deal wasn’t just the notwithstanding clause. There were changes to the provision for provinces to opt out of some future constitutional amendments, and to the education clause, with tweakings to other parts of the already well-developed draft of the Patriation package.
Overall, I think it’s pretty clear that if s. 33 had not been included in the Charter, there wouldn’t have been a constitutional accord in 1982, even the flawed one that didn’t include Quebec. If you say s. 33 shouldn’t have been included, then you are saying that no Charter is better than a Charter with s. 33.
This blanket statement is simply not an accurate summary of how democratically elected parliamentary systems in the Westminster system operate. They are much more nuanced than this statement suggests.