Also, if you're intending to report actual bugs directly, rather than giving general feedback, you can use this form to submit formal bug reports:
https://larian.com/support/baldur-s-gate-3#modalThe bug forum section here is good too (especially for helping to create a better picture of how many people are experiencing a particular bug, and other spread and scale factors like that), but if you use the official form you can include a copy of your save file and/or a screenshot so that they can reproduce bugs you report reliably.