Dear,
Where on the earth have you heard of King's has bad reputation?
King's is highly regarded internationally. Among the British Universities, just Oxbridge, UCL, Imperial, LSE, King's and Edinburgh tops the 50 best positions in the most reputable international rankings (QS, THE, Shanghai and U.S. Global Universities).
Even good UK unis as Manchester, Warwick, LSE, Durham etc. do not get be ranked in top 50 in all those four most prestigious rankings.
So who dare say King's is bad, have to face all those international rankings, with different methodologies!