But there’s your problem, surely, OP. I mean this kindly, but your consuming need for validation and to be liked by people, regardless of your opinion of them, may be off-putting even to perfectly reasonable people. It can come across as suggesting desperation, poor self-esteem, and — crucially — as though you’re not actually at all engaged with the actual person in front of you, because all you’re thinking about is yourself and how you’re coming across. Nerves and self-consciousness can come across as not dissimilar to arrogance or self-absorption, because in both you’re only really thinking about yourself.
Ironically, you will make friends more easily if you come at it from the position of ‘Which of these people do I like? Who might be a potential friend?’ rather than a blanket attempt to be accepted by everyone, whether you like them or not.
I do know what it’s like to feel excluded — I spent eight years in a village where I just didn’t gel at all, despite being a socially-confident person who had never struggled with friendships — but that was just a poor match of person and environment, and no one’s ‘fault’.
I moved countries before the first lockdown, and while that was a challenging time to make friends as I wasn’t working initially, in the eight weeks between our move and schools shutting, I immediately found people I liked among other parents, and suggested coffee or a playdate if DS (then 8) liked their child. Obviously not all these turned into friendships, which is fine — my point is only that you shouldn’t try to ingratiate yourself with large groups of people you only know because of a child’s hobby or because they’re at the same school, and then get upset when they don’t ‘accept’ you. You might as well get upset that people at your regular bus stop don’t like you.
Centre your self and focus on who you like, and might want to know better — think about what you bring to a friendship. Work on your self-esteem and on happiness within yourself. Don’t behave as if you’re a slightly shopsoiled sale garment expecting to be passed over.