I think Ch3 and Ch7 excel in their own style. Ch3 makes better period pieces than Ch7. Ch7 period pieces are typically slow and go nowhere. Ch7 makes the best action lakorns. Look at Kom Faek. Mark's remake was so incredibly bleak and depressing, Poh and Noon's version had a good balance of action, drama, romance, and comedy to keep you entertained. And honestly, I like what Ch3 does with their koo jin promotions. To each their own.
I think present day Ch7 is a lot better than it was over a decade ago. I'd like to think of 2007-2013 as the Ch7 dark ages. When Khun Daeng was in charge, it was crazy. Lakorns would be ruined because they extended them so much due to good ratings and she'd do everything based on a whim, I remember this one time she aired Vee and Yok's lakorn all week just because she wanted to. Ch7 lakorns in 2007-2013 were sooooo bad, I almost quit watching their lakorns. But then things got better. Ch7 is honestly still the best channel simply because they made so many good classics and I grew up watching Ch7 lakorns. Like you're not going to get the magic of Dao Prasook, Tawee Pope, Silamanee, Yatika, etc, ever again in this day and age. I hate DaraVDO and Dida but I'm also thankful that they made my favourite childhood lakorns and they were a lot more competent in the past. I also like that Ch7 constantly makes musicals, I never get tired of seeing Weir sing in some field haha.
Ch3 used to make better romantic lakorns. Ch3 can't make anything close to Manee Yard Fah nowadays. And Ch3 used to have the best slap and kiss lakorns. Ch3 is sooooooooo PC nowadays, it is annoying. For instance, I enjoyed Kluen Cheewit, but it felt VERY subdued, if it was remade a decade earlier, I bet it would have been spicier. Like WTH was with the remake of Samee also? It is hardly the same lakorn. Who & Who also used to make the best lakorns like Manee Yard Fah, Rachanee Morlum, Wanida.
So yeah, all channels have their fair share of problems but they also shine in different ways. I feel no loyalty for one channel over the other anyways.