You're probably right. The wars have served their purpose, i.e. distract voters from domestic issues. Who in power cares if they win or lose if they're still in power?

Why is the US chosing to lose basically every war they've been involved in since WWII?

That is an interesting question.

The other poster said "to distract from some other issue".

There are various people who point out that winning as most define it was never the objective in the first place, and the US doesn't care.

After WWII England (and to a lesser extent France) decided they didn't want to pay to be the world super power anymore. The US took over that roll, but to appease those who don't like that the US is willing to appear as a fumbling idiot despite meeting their objectives.

There are probably other reads, those are just the 3 I can think of right now.

"the US could have won but have chosen to lose"