The referees are still adapting to this 'light touch' policy and until they've ironed it out then there'll be issues like this; well, that and getting decent referees.
Looking at VAR and how that took a while to really become correctly implemented, and it's still not perfect. I also feel that people are getting carried way.
In terms of Burnley, for me the infamous Richarlison tackle by Mee was a yellow and nothing more. Wrongly, we got nothing for it, but it's not a red.
Yet, Struijk got sent off for a tackle that wasn't a red, while Son did a similar tackle (in fact, worse due to the vengeance) and his ban as repealed.
The real issue here is the inconsistency. You're right, some clubs might not have got those decisions, but I sincerely don't think it's intentional bias.