Simply not true. Got our first penalty of the season yesterday. Should have had 5 or 6 before then - including vs Man Utd, Sheffield Utd, Luton, Villa, and West Ham. Nketiah should have been sent off in the game at Arsenal. Carlos should have seen straight red for Villa, while Cash and Mcginn should have had two yellows each. Joelinton should have been sent off yesterday. Chelsea should have been penalised for deliberately targeting Maddison - leading to his 3 month layoff - but ref persistently let them get away with it, which is why Udogie and Romero lost their heads and why Spurs consequently lost the game. In that game, Sterling should also have seen two yellows for clear dives in the penalty area but wasn't even shown one. The first of those was immediately before the Romero red and penalty. While it was fair that Romero's red stood (no free hit for serious foul play), the game should have restarted at the point of the original offence - Sterling's dive. Therefore, free kick to Spurs and no penalty. Probably more incidents besides that I can't immediately recall.
I'm not trying to make out that Spurs are especially hard done by and I fully concede that Romero is a fucking liability who needs to learn to control himself. But this narrative that Spurs always get favourable decisions is bollocks.