Two thing
1.Honestly just because they are older females doesn't make it ok for them to leave Spike out of their fun. So its bad he missed out on stuff in season 1 and 2(especially when its like the Element are blocking Spike from being part of the Mane 6's bond)
2. Many times Spike suffered is really undeserves. That lake bit in Winter Wrapup was so freaking wrong, he may been grumpy(and apparently Twilight knew he be grumpy due to she had it on her list) but he really did not deserve nearly drowning and getting a cold.
Sadly nope.
The consequences are all ignored/brushed off.
Really what happened to Spike in the season 9 premire should have been the LAST STRAW HARD.
But nope, its ignored.
He SERIOUSLY should not brush that off but the writers flip a switch and ignore the festering wound.
That episode where he's useful is really botched up hard.
Where it rubs it in that he's not allowed to be equals with the Mane 6.
And it didn't solve the problem. He wanted to be helpful MORE OFTEN, but instead of came off as he is only helpful in super situational mascot/sidekick stuff, where most of the time he's sidelined/useless.
Power Poines was an awful episode for his character and worsened the issue on he's not allowed to be equals with the gals.
Power Ponies didn't even fix it but made it worse by saying he will never be equals with the Mane 6, he's stuck as the "powerless sidekick" and only allowed to help in super situational stuff and most of the time can't help.
He clearly WANTS to help MORE OFTEN, this episode did not fix that but instead saying he can only help in super rare mascot moments.