Not really. It would just make it easier for rats to take over. Small animals would quickly get back to the old numbers, but bigger predators in the ecosystem might not recover. So if Thanos plan was for cockroaches and rats to rule the world, well then maybe.
All the edgy memelord types I used to know who were arguing "actually Thanos' plan makes a lot of sense" when those movies were new... they're now all unrepetant, enthusiastic Trump supporters.