It doesn't help that I design board games too, and have too much of an easy excuse to want to get these games so I can 'research' them.
And because I'm mentally tired all the time after work, that also seems to lower my willpower. And clicking the 'buy' button online is way too easy to do.
We did used to host a monthly game designer playtest night before the pandemic, but our house had a lot less stuff back then. And being stuck in the house during the pandemic with nothing to do but play solo board games and video games (and also the uncertainty if I was even going to make it through the pandemic, since I already had respiratory issues from asthma) definitely accelerated the bad impulse buying habits I already had.
We have made slight dents in it, but the significant declutter probably won't happen until the next time I'm in between jobs, assuming there's at least a month in between jobs.