The EC serves both small and large states, so it’s an equilibrium.
There are many ways to prove this is false:
1. States do not get the same attention. States of all sizes are equally ignored. Until this cycle, the largest state to get any attention was FL, followed by PA and OH. From the smallest states, only NH's 4 votes get any attention; all other 3 vote states are ignored. In 2016, people claimed that the EC worked because CA alone cannot determine the election. This time, larger states became more predominant, as TX, AZ, and GA joined the fray; however, NH was pretty much largely ignored, as was IA. So this election skewed attention to larger states at the expense of smaller and medium states. What's the rationale this time when AZ and GA, along with WI, MI, and PA are the ones that decided the election?
2. States do not have equal weight in the EC. WY gets 3 EC votes and serves as the base for all others. Given that the number of electors fluctuates based on the number of representatives, CA's 55 votes are uneven with what WY gets. A House where states are represented as ratios to the smallest state is a better way to serve all states.
3. Even if we take #2, states are still uneven in HOW their population is represented per EC vote. Currently, using WY as an example, each WY EC elector represents roughly 192k residents; the state least represented (currently) in the EC is actually TX, with each TX EC vote representing roughly 763k residents, so TX has roughly 3 times as many people represented per EC vote than WY. TX would need about 150 EC votes so that each EC vote matches what an EC vote in WY represents.
4. Even taking all of this into consideration, many people are essentially invisible when it comes to the election. The WTA approach means that the 4M+ Republicans in CA had no say except a fool's hope to give their candidate some votes. The same thing happens with the hundreds of thousands of Democrats in OK, overwhelmed by the state's conservative leaning. All of which leads again to point 1: some states, by their nature, under a WTA system, get absolutely no attention.