Man that sucks. I must have gotten lucky or something with my setup. I also have trackers go unavailable all the time but I enabled 8 different ones and usually multiple will have the same torrent so it usually has no problem finding something even if 1 or 2 are down. I also don’t VPN tracker searches, just my BitTorrent client so flaresolverr seems to work fine for me (I only have it enabled for 2 of my trackers since most of the ones I use don’t seem to require it).

If you end up trying it out again I would look into the quality settings and make sure you’re not using the remux quality profile. By default most of the quality profiles seem to limit at 100MB/min, so a 2 hr movie shouldn’t allow anything over like 12GB. Whenever I tweak quality or custom formats I refer to trash guides which has a lot of battle-tested rules you can copy. I have my main profile set to only download qualities between hdtv720 and br1080 with custom formats set to prefer hevc with surround sound since I have 5.1.