"We are the ones who don't want this war to end"
I agree, but I thought the False Leftist criticizing Biden for "not wanting it to end" at least meant that Biden was somewhat moving in our direction...
" I fear Biden etc. do want it to end, which is precisely why they demand merely Russian withdrawal from Ukraine (not even Crimea) i"
I don't think Putin will accept such a deal from Biden, as the sanctions have given him more incentive to tap into Ukraine's energy reserves (unless of course Biden agrees to alleviate sanctions if Putin accepts the deal). Meanwhile, a steady flow of weapons should keep the fighting going (unless, of course, as you mentioned, Biden stops supplying weapons as soon as Putin accepts the deal).
I do agree though that Biden ultimately wants the war to end, but as of now, it doesn't look like he is getting what he wants.