I still think that Ukraine committed a great stupidity by not making an unconditional surrender in March last year. Ukraine did not have, does not have and will not have a chance in confrontation with Russia. Any tactical success is simply an increase in the number of deadweight losses and an increase in the amount of debt to Western countries, for which future generations will have to pay.
You seem to be very confident about Russia abilities to continue war for many years with unlimited number of tanks, missiles human power and etc. And at the same time you understimate West. Things like Himars is cool, but in general, NATO countries gave to Ukraine things that they don't need themelves. Like tanks from soviet era, post WW2 howitzers. But they aren't getting things what would be real game changer like long range missiles for HIMARS, combat aircrafts and etc. There is so much noise about air defense systems or Leopard tanks because West still fear to ''escalate conflict. But Ukraine achieved a lot already with things that they have.