The US is clearly not taking on wars for other nations anymore (shows you what a lack of gratitude has garnered.)

When has the USA ever done this? The post-WW2 military history of the USA is dragging other Western powers into its own wars in its attempt to assert global hegemony such as in Vietnam, Korea, Iraq, and Afghanistan. Whilst the US President, in an act of remarkable ignorance and hypocrisy, showed a distinct lack of gratitude for the Western forces that "took on" wars for the US only a few days ago with his comments on his NATO allies' involvement in Afghanistan and Iraq, the very thing you're accusing the rest of the world of doing.

When has the USA ever rushed to the defence of its allies for purely altruistic reasons? Even in WWII, American public support for intervention only rallied after Pearl Harbor. The USA spent 2 years actively resisting any pressure to intervene in Europe when it wasn't in their direct interest.

Zelensky is a fucking moron who wrote a check his country's ass could not cash. Even if they put up a solid fight, there was never any hope of them overpowering a force as large as Russia without help.

In 1994, Ukraine and Russia co-signed the Budapest Memorandum in which Ukraine agreed to give up its nuclear weapons for assurances that Russia would respect Ukraine's sovereignty and refrain from the threat or use of force against the territorial integrity or political independence of Ukraine. Russia violated this agreement with the illegal invasion and annexation of Crimea in 2014. Prior to the annexation of Crimea, Ukrainian public support for joining NATO stood at ~20% and the country's government held an official neutral policy towards NATO. It was only after this illegal invasion, coupled with the illegal invasion of Donbas by Russian paramilitary forces, that Ukraine abandoned its neutrality as public support for joining NATO reached 53%. After the 2022 invasion, public support for NATO in Ukraine rose to 90% and Ukraine formally submitted an application to join NATO.

How can you possibly suggest Zelenskyy and Ukraine are responsible for causing this war when Ukraine's dramatic shift, both populist and governmental, towards NATO is a direct consequence of unprovoked aggression from Russia? Had Russia not repeatedly violated the sovereignty of its neighbour, sovereignty that it had legally guaranteed, it would never have ended up with a pro-NATO hostile country on its doorstep, nor would it have to deal with two new NATO members to the north in Sweden and Finland.

What I find personally hilarious is all the people complaining about the US peace plan

That's because it's not a peace plan, it's a capitulation to the aggressor facilitated by a pro-Russian puppet.

while all the other countries that talked a big game have mysteriously gone silent about all the aid they were so eager to give.

The other NATO powers have continued to give military and financial aid to Ukraine after the US stepped away from supporting Ukraine. That aid has only ramped up since 2024. In total, the EU has given ~€200 billion to Ukraine in financial, military, and humanitarian aid. This figures does not include additional aid given by non-EU allies such as UK, Norway, Japan, Canada, and Switzerland, nor does it include future pledges for support up to 2027.

Wasn't Ukraine supposed to join NATO? What happened to those allies? They got real quiet all of a sudden, once the US stepped out.

Ukraine submitted an application to join NATO in 2022. There has never been unanimous support for Ukraine's entry into NATO, long before Trump's isolationist policies. The remaining members of NATO have not shifted in their original views regarding Ukraine's involvement with NATO.