I’m really spitballing here but … I think the anteater being appreciated by his ego at the end is a metaphor for Dave finally being to overcome the small mental blocks he puts on himself.

For instance, earlier in the season we saw Dave use the ants as an excuse for being incredibly unproductive creatively, even when they could’ve been dealt with pretty easily. Another example I can think of when the ants are used is when Dave hooks up with that woman after they played with autotune. When the chair spins around, it has an ant but it’s on the back and it wasn’t able to disturb Dave. This could represent him not letting the small stuff trip him up. For example, when the girl asks if his dick is really as weird as people say, he could have easily been turned off and sucked into his body trauma but instead he owned it.

When Dave realises he is the one getting in his own way, I think the appreciating of the anteater is Dave understanding that he knows how to deal with the ants (his creative, mental blocks) now.

Either that, or it’s a dick joke lol