Well, Putin is savvy, that doesn't make him good, it just means he's savvy.

Following his cue to do nothing of substance that would actually deter Putin and cause him to withdraw.

Trump imposed sanctions on Russia, those were the sanctions Biden rolled back in his first days in office. Where do you get your news?

2008 when Bush was president. Did you read the post you are responding to?

Biden dropped the sanctions that were on Putin's Nordstream pipeline & simultaneously cancelled the American/Canadian Keystone pipeline making Western Europe more dependent on Russian gas & less able to stand up to Putin in substance.
Then he showed American weakness and complete incompetence in Afghanistan.