We had one instance where it backfired so far. About two months ago I overdid it a bit when telling him to cut out going number two in the shower/bath (happened

We had one instance where it backfired so far. About two months ago I overdid it a bit when telling him to cut out going number two in the shower/bath (happened 2-3 times during potty training). That traumatised him about bathing, to the point where he was scared of going to take a bath, instead wanted to sit on the toilet for 1-2h. Let's say he already showed me where my boundaries are...