It depends on the anti you run into.

Some antis consider any age gap, even between adults to be problematic.

Some antis who ship adult characters with age gaps are shocked to find out that those other antis exist, when they get bullied for their ships.

There is no ship you can ship that someone won’t try to bully or shame you for.

Just ship and self ship what you enjoy and ignore anyone who tries to use shame and violence against you to ruin your fun.