de_jungle_beta_v2: Really, REALLY bad map. Zero Optimization so everyone fps drops somewhere around 10-40, gameplay is boring and it only fun part is bridge, but it is small.
cs_Bikini: Another map with zero optimization and has quite lacking gameplay, unsure about this one as some people might like it. Biggest issue is really huge fps drops for everyone.
zm_icicle_b2: I don't even know where to begin, this map is not for TTT in any aspect, it is small house and large open field.
cs_office: We have office extended, it is larger, plays better and it has elevators.
ttt_cluedo_b5: Was made for old TTT with no c4 and such, now one c4 can explode half of the map.
cs_compound: Rather open map, only people having fun on this are sniping traitors, only interior parts are small warehouse and somekind factory.
zm_cleanup_b2: If Notary ever removes all those ZM gimmicks from the map, i could see this play much better and begin much more playable map.
ttt_c17ruins: Simply put, bad map.
ttt_manor_pez_v1: Can't belive i forgot this one, awful map, by far worst custom TTT map ever made, it doesn't even have cubemaps.
rp_blackmesa_alpha32: HUGEEEEEEEEE map, innocent usually win this by timelimit.
dm_abyss: Too small, way too small, has 6 open rooms with barley any cover.
dm_lost_monastery_v1: Your list says we still have this map, sure, it was pretty damn good map for TTT but mysterious spawn glitch crashes the server.