I agree with Chuck Jones...
...Just about all the Looney Tunes act completely out of character in this, primarily in the case of Bugs Bunny. Bugs Bunny is supposed to be much more clever and self-reliant than he's portrayed here, and would've been able to outsmart the aliens and save the world...And in just a span of seven whole minutes, at least.
Chuck Jones didn't like Space Jam, in fact he hated it, and found it absurd how they could've stretched such a nonsensical, character betraying story to 90 whole minutes.
I also would agree with Jones on the character of Lola Bunny, she's a totally useless character, good thing the people behind Cartoon Network's short lived Looney Tunes series revamped the character and made her actually looney( Being voiced by Kristen Wiig helped a lot too).