Nice try. 3/4 of our spending is on entitlements.
I suppose that depends on what you mean by "our spending" and what you mean by "entitlements." Assuming you're talking about the federal government, and you don't count national defense and paying interest on the debt as "entitlements," though, then no. As for FY 2020, the defense budget is 15.9% of outlays, and net interest payments are 9.7%, so right there you're up over 1/4, before even considering various other budget items few would call entitlements (homeland security, international security assistance, highways, the FAA, the FCC, the SEC, R&D, space exploration, land management, and so on).
Anyway, the US has a very lean budget in most areas, compared to other wealthy nations. When you compare the percentage of our GDP that goes to government spending on social programs, we come in unusually low. Where our spending is unusually high is when it comes to the military. No nation in world history has ever spent as much on its military, relative to the other leading militaries of its time, as we do. We spend twice as much as all our adversaries combined. It's unprecedented. For those who are serious about finding budget savings in a non-counterproductive way, that's where to look.
I'm not sure who has higher taxes and better standard of living.
There's no clear agreed way to measure "standard of living." Do you go with life expectancy, amount of leisure time, poverty rates, educational levels, or what? Is the US's standard of living high because we have fairly high median incomes? Or is it low because we have some of the worst incarceration rates, infant mortality, obesity, drug abuse rates, teen pregnancy rates, and suicide rates of any wealthy nation? Among various wealthy nations, different people will make pitches for different countries, depending on what they think the proper way to think about standards of living is.
However, what's clear is that the US has abnormally low taxes for a wealthy nation. As of 2016 (the last year for which data is available for all OECD nations), the US collected revenues equal to 25.9% of GDP. The only OECD nations that were lower were Turkey, Ireland, Chile, and Mexico. So.... three poor nations and one boutique economy the size of a city that effectively functions as an off-shore tax haven. Every other developed nation has higher taxes. The highest are in Iceland, Denmark, France, Belgium, Sweden, Finland, Italy, and Austria -- with tax revenues of between 42.2% and 51.6% of GDP.
So, again, the point is that we have ample reason to believe that we can raise taxes while maintaining high quality of life, since every other major high-quality-of-life country has higher taxes than us. It's less clear we can lower taxes without losing quality of life, since nearly every major country with lower taxes than us is one with a shitty quality of life.... the only exception being Ireland, which has an economic model that can't be emulated at our scale, since a huge portion of its GDP comes from simply being the nominal location of economic activities by corporations fictionally headquartered there for accounting purposes.