I don't get where this comes from, simply because an admin didn't get back to you? the specific Admin you are referring to is juggling 99 things at the same time and I know that they meant it when they said they'll get back to you, we're constantly working on Bedrock because we understand its popularity, 99% of my work personally is on Bedrock as well.
As for the under-staffed thing, this is true, but this is because our Java community has been centralized on the forums for a very long time, we're not seeing enough quality bedrock applicants because we didn't advertise our Helper applications in-game, we started doing this and now we're seeing more applicants coming through the door, the hope is that they will stay with the community and get up to the standards required to train for staff.
Bugs are complicated, Bedrock as a client can be quite buggy at times, more bugs pop up way more frequently than Java by a lot, again this comes down to a lot of bugs being present at once and we're trying to fix them quickly so that player experience isn't ruined.
Not all bugs are equal either, some are really hard to fix and not as simple as you might think, some take minutes to fix, it largely depends and you as a player do not know how our network functions and so you can't judge each bug accurately.
As a network, we understand that some bugs ruin your experience for a few games. However, promising that every bugs that are reported will instantly get fixed is unfeasible for the both of us. We have a developer team of around 20, all of which are on larger, separate projects - most of which are extremely time sensitive. We’re excited to be bringing you these, however, it does mean some attention has been brought off of these bug fixes.