That would just be an inconclusive end to the war. An actual surrender can be conditional (an explicit deal that favors the winning side) or unconditional. In an unconditional surrender, the winner is free to do whathever they want. For example, they can walk in, rewrite your constitution, and dismantle your military and the industry supporting it.

Yes, Putin cornered himself, the ambitious evil idiot...especially after their official act of joining the invaded lands to Russia.